[Unnamed Emotion] Ryomen Sukuna and Muzan Kibutsuji

\=Taisho era\=

Muzan and (Y/n) meet for the first time when she sees him unconscious not far from her house. His body is covered with blood, and he looks pale as if he's already dead. (Y/n) touches his cold face, but suddenly he opens his eyes, and grabs her neck, choking her. (Y/n) tries to pull his hand from her neck, but he is too strong.

His cat-like plum red irises meet with her (your eyes color) ones. Tears wells up in her eyes, before Muzan finally lets his hand go from her neck. She kneels and coughs. He stands up, looks at his surroundings but it's dark out here, and then glares at her.

"Where am I?"

(Y/n) furrows her eyebrows as she looks at him. She stands up as well, and looks at him.

"You're at Kumotori mountain."

Muzan frowns. "Kumotori," he looks around once more again. Then he sighs.

(Y/n) rubs her neck before she kneel down and take the herbs that falls to the ground. Muzan sees that there is a red mark on her neck when he chokes her before. The more he looks at her neck, the more hunger he feels. (Y/n) is taken aback when suddenly Muzan put his lips on her neck.

She blushes and pushes him away. "What are you doing?!" She shouts as she puts her hand on her neck again.

Muzan grabs her hand and pulls her toward him. He sniffs her neck despite her effort to get away from him. Demon's scent. But she is a human.

"Where do you live? Is it far?"

"Why you ask?" She asks. "Don't tell me you want to go to where I and Grandpa live after what you've done to me?"

"Grandpa?"

(Y/n) doesn't give him any response and just glares at him. Realizing that she is mad at him, he clears his throat.

"I'm sorry for what I've done to you before. I was careless and a little bit... anxious," he admits.

(Y/n) studying his face. He looks genuine with his apology. Then she stares at his pale face then his clothes. It's wet and very much shows his muscles underneath it.

Muzan notices her gaze. He put his hand on his mouth and coughs. (Y/n) startles. When she finally notices that Muzan knows where her eyes are directed, she blushes again. 

"Y-You'll get a cold if you stand like a wet rat like that. Le-let's go," she says before she turns her back and walks fast. Muzan sees her red ears. She looks back. "Don't just smile like an idiot, follow me," she says as she continues walking.

Smile? He put his hand on his lips. "Did I just smile?" He mumbles.

After walking for a while, they finally arrive at the small cottage. She opens the door. "Grandpa, I'm home."

Her grandfather walks toward her, "Why are you late, child?"

"Ah, I met with a strange pale man."

Her grandfather raised his eyebrows. "A man?"

"Yes, he is he-," when she is about to introduce him, he is not behind her. So she goes outside again, and pulls the hand of a stranger. "Why are you just staring at my house like that? That's rude, you know."

He grandfather widens his eyes when he sees Muzan. "Grandpa, this is..."

"Welcome to my humble house, Muzan-sama," he says as he kowtow in front of him.

(Y/n) widens her eyes.

Her grandfather and Muzan looks at (Y/n) who is waiting outside as she collects the woods.

"So you tell me that you've been hiding in this... poor house pretending to be her Grandfather who was supposed to be dead after you devoured him, huh?"

He looks at (Y/n). "I think of her as my lost daughter. If she was still alive she would be so healthy like her."

Muzan chokes him. He struggles. "I clearly told you that you shouldn't show your feelings, Hantengu."

"I'm sorry, Muzan-sama." He let go. Hantengu put his hand on his chest. "Should I kill her, Muzan-sama?"

Muzan stares at her. "No. Not yet," he sighs. "We need her as camouflage."

"Yes, Muzan-sama."

"Treat her like you usually do," he says as he stands up.

When Muzan walks outside, his eyes meet with hers. He walks toward her and grabs woods on her hand. "Let me help you," he says as she opens her mouth ready to complain.

After he puts the woods in the basket, he looks at her. "I might stay in your house for awhile if you don't mind."

"What did my grandpa say about this?"

"Well, he approved," he shrugs. "We'll live under the same roof for awhile now." He smiles at her.

"Whatever," she says as she turns her back, Muzan notices that her ears are turning red.

​​​​​​

​ ​ ​ He says a while but it has been six months since Muzan lives with them. He and (y/n) become closer, so close in fact. Her world is full with Muzan since they never meet other people on that mountain. She always looks happy when he is near her, but he doesn't know what it is called, he only knows anger, and vengeance. Those two feelings, so since he doesn't understand it, he pretends to be oblivious about it.

One day when she went to the other side of the mountain, she found a horrible scene when an entire family was slaughtered. When she almost screamed out of fear, someone put their big hand on her mouth. She is struggling to escape, but Muzan's voice calms her. She hugs him as she cries. Then Muzan takes her far away from that scene. (Y/n) becomes a quiet girl, but she still smiles at him. She thinks everything will be okay as long as Muzan and her Grandpa's okay. However, Muzan starts to go out at night silently, but she never asks. Until one night, she wakes up right before Muzan leaves. Then she carefully follows him. 

She keeps following him until she squints her eyes when she sees a bright light in front of her. And the next thing she sees are bright lamps, people, and big houses. She finds them fascinating, and smiles as she looks around. When she finally realizes that she loses track of Muzan. She walks so fast as she keeps looking for him.

Alas, she couldn't find him anywhere. And people stare at her like she is a weird fellow since she only wears her humble and worn out clothes. She becomes conscious with herself now and how dull and old fashioned she looks compared to girls her age that look at her with disgust as they giggling. Her face is so red. She lifts her head up, trying to hold back her tears as she looks for a way to go back to the woods. But nothing.

"Look how poor her clothes are," remarks one of the girls.

"I know, right?" The other one laughs. "I think I smell something foul as well," she adds.

(Y/n) grits her teeth and clenches the hem of her clothes. "I may look like a beggar, but I don't act like one."

"What?" The woman with long hair glares at her. "How dare this bit..." She lifts her hand.

(Y/n) already prepares herself for the hit. But it never happens. When she takes a peek, a tall and well-built man stands in front of her as he grabs that woman's hand.

Then he pushes her hand away, as he glances at (Y/n). (Y/n) looks at him. He is a handsome man with pink hair slightly pushed upfront, and beautiful eyes. And he wears black kimono with the drawing of ravens. Then that man looks at the girls again.

"Go," he says with an intimidating voice. The girls shivering.

"Let's go. He is a young master from a noble family," says one of the girls.

After they run off, (Y/n) sighs in relief. Their eyes meet again, and she bows down in front of him. "Thank you so much for saving me, Sir."

"Ryomen Sukuna."

(Y/n) lifts her head. "Yes?" He just stares at her. "Ah, o-okay, Ryomen-sama."

Sukuna looks around. "Are you here alone?" She shakes her head. He stares at her from head to toe, and how shameful she is with her appearance. She just wants to dig a hole and never come out of it.

"Let's go buy you some clothes."

She shakes her head roughly. "Please no, Sir. I can't burden you with that. I'll just go home now."

Sukuna sighs. "Just follow me."

"But... I'm a stranger, Sir."

"It doesn't matter."

He walks first, (Y/n) fidgeting. Should she follow him or not? But she doesn't even know the way home. Maybe if she follows him, he will kindly tell her the way to the woods. So she hurriedly followed him.

He really buys her clothes, even to the point where he waits for her at the saloon where they bathe and put make up on her. He even gives her all the newest cosmetics. He doesn't even bother with money and her whining when he keeps buying her stuff.

After a while he looks at (Y/n). She wears white kimono with pink flowers, while they let her (your hair color) and (your hair length) hair loose. (Y/n) blushes when he stares at her intensely.

"Well, now you're good, little girl."

"Yes?" She startles with his praise. "Ah, thank you, Ryomen-sama."

"You can go home now," he says. When he is about to leave her, she grips his clothes.

"I..., please tell me the way to the woods."

He tilted his head. "Woods?"

"I... I live at Kumotori mountain, Ryomen-sama."

Ryomen looks at the gloomy mountain behind her. Then he pointed his finger at it. "It's behind you."

(Y/n) turns around and then she smiles so brightly to him. "Thank you, Ryomen-sama."

He stares at her face and how beautiful her smile is. Then something that never happened before happened.

His heart beats so fast. It's different from when he usually feels when he kills women and children. But he can't understand what it is called. When he finally pushes that thought away, (Y/n) already leaves. He put his hand on his chest.

"What is it?" He mumbles.

(Y/n) hurriedly walks toward that mountain. When she hears a ruckus, she tries to ignore it, but something catches her attention. Muzan. She sees him, with a beautiful woman and a... child? She furrows her eyebrows when she finally realizes something. Muzan is a married man? And there is a young boy that seems to be holding a grudge toward him as he holds his collar and shouts something like "demon" while Muzan just stares at that boy, a little bit taken aback.

Nevertheless, the next thing she knows is that another woman shouts as her husband bites her, and the young boy with a scar on his forehead dragging that man's body away from his wife. And everything becomes chaos, eventually she doesn't know what she has to do instead stands still like an idiot when that monster-like man tries to bite her.

"Watch out!" That boy shouted at her.

(Y/n) wants to move away from him, but... her legs, it doesn't move at all. Muzan looks back when he hears that boy shouts, and how surprises he is when he sees (Y/n). She is different since she put make up on, but that's definitely her. He is about to save her, but a tall guy already runs towards her and pulls her away as he takes down that man with one kick.

(Y/n) looks up to see her savior, and it is Sukuna. "Ryo-Ryomen-sama?"

Sukuna looks at her. He looks like... worries about her? "Are you okay?"

(Y/n) nods, but he knows she is afraid since her hands trembling on his chest.

Muzan grips his hand. The woman beside her, touches his hand. "Honey, are you okay?"

Muzan averts his eyes from (Y/n) and smiles at his "wife". "I'm okay."

Then when their car arrives, Muzan tells his wife and child to go home first since he has something to do at town. After they leave, Muzan hurriedly goes to the place where he sees (Y/n), but she is nowhere to be found.

Sukuna sits beside (Y/n). She still looks pale with the incident that occurred before. He is wondering why he looks after her like this when he, the great sorcerer in the world, enjoys people being eaten or killed by demons instead of him. But strangely and technically they are strangers, however when he sees her in danger like before, his body moves on its own to save this girl.

(Y/n) glances at him, and she wipes her tears before she stand up. "Thank you for saving me again, Ryomen-sama," she bows at him.

"Just call me, Sukuna," he says as he stands up as well. "Let's go, I'll take you home."

(Y/n) shakes her head. "No no no. I don't want to burden you, Ryo-" Sukuna looks at her. "..., Sukuna-kun."

"You're not. Let's go."

(Y/n) nods and they are walking side by side to the mountain while Muzan stares at them.

Sukuna knows someone, or he might say, a demon staring at them, or maybe her. He also notices that she has a demon scent on her, even though she is a human. Since it is rare for a demon to coexist with humans. They are always hungry for a human flesh, especially Demon Slayer's flesh. 

"Thank you so much for everything you've done for me today, Sukuna-kun."

"It's nothing big."

"So... Why are you helping me?"

He shrugs. "I just feel like it," he smiles. (Y/n) blushes. He is indeed handsome, especially when he smiles like that.

After some time, they finally arrive at her house. When Sukuna looks around at her house, (Y/n) turns her back to face him.

"Do you want to stay the night here?"

"You probably don't know what that means," he mumbled.

"Yes?"

Sukuna shakes his head, and pats her head. "You should get inside now. It's already so late."

"But how about you? It's dark outside and what if there is a demon like before?"

Sukuna chuckles. "I can handle that."

"But..."

"It's okay. I'll be fine," he says reassuring her. 

"Okay then. Well, good night and thank you for everything," she blushes again when she says that.

Sukuna nods his head and then he walks away toward the woods. After he leaves, Muzan appears out of the woods. The next day, like he and her grandpa always do, they stay inside the house playing chess, while she does her laundry. After she finishes her chores, she sits in front of the fireplace while staring at the sky.

"What are you doing?"

"Staring at the sky," she answered.

Muzan sits next to her as he stares at the fire. "(Y/n)."

"Hm?"

"Why don't we move away from this place?"

(Y/n) looks at him. "Move where?"

He shrugs. "I don't know. Somewhere there is not a mountain like this."

"Like what then?"

"Let's move into my house at the town."

(Y/n) furrows her eyebrows. "I can't leave my Grandpa here alone. You know that too."

"It's okay, child."

Muzan and (y/n) looks behind them. "I'll be fine here. You should go and see other people beside me and Muzan-sama."

She stands up and walks toward him. "But if I leave, who will take care of you? What if there is a bad guy who wants to hurt you? What if..."

Hantengu holds her hand and pats it gently. "I'll be fine. Go with Muzan-sama."

"I understand, Grandpa."

The next day (Y/n) follows Muzan to his big mansion. She looks at his house with mouth wide open. Muzan smiles at her and takes her hand, as they get inside the house. He introduces him to his maids and butler. She learns later that when the night comes, they aren't staying at the mansion. So it will be her and Muzan every night.

Strangely Muzan never goes outside when it is still bright outside. He always takes her to buy clothes and stuff at night. But she isn't suspicious of him, though she has a doubt indeed. 

"Do you want to go?"

"Yes. I want to take a walk in town, and buy books. And i heard there will be fireworks at night, so I would like to see it."

Muzan stares at the window, it is bright outside. "I..."

(Y/n) smiles at him. "It's okay. I know you are busy. I can go alone."

Muzan looks at her, before he sighs and walks towards her. He caresses her smooth cheek with one hand. (Y/n) a little bit taken aback but she just stand there. "I'll go with you to see the fireworks..." He lets his thumb touch her lips. (Y/n) holds her breath. "...after I finish with my work," he continues.

(Y/n) chuckles. "Yes, I understand."

Muzan smiles at her, and moves away from her. "Just be careful, okay."

She nods, "Um."

Just like she said to Muzan, she only buys books with her. She looks at the food stalls at the market and buys some foods, from something sweet, sour and spicy. She sits on the bench as she looks at the pond where there are so many ducks on it as she savours her delicious food. Then someone sits next to her. (Y/n) glances at the one who sits next to her, and then her face brighten.

"Ryomen-sama."

Sukuna stares at her before he smiles. "I clearly told you to call me, Sukuna."

(Y/n) chuckles. "Sukuna-kun."

"Yeah, that's more like it," he says, contempt as he stares at her smiling face.

He noticed her at the market before. And he plans to leave but in the end he ends up following her, as he chuckles and smiles when he sees her buy so many foods and eat them like a squirrel. When she sits on the bench, he is going to leave and mind his own business, but he sees a demon on the pond, the one who can harm her, so he immediately kills it while he sits next to her.

"So what are you doing here?"

"Just take a walk." (Y/n) nods. "Don't you have to go home now? It's almost dark."

"It's okay. I don't live in the mountains again."

Sukuna furrows his eyebrows. "Why? Perhaps..."

"Ah, it's not what you think it is. There is no monster that attacks me of anything. I just moved in with someone."

"Your boyfriend?"

"No."

Strangely he feels relieved. "Just a friend?"

"Well, he is someone I have known for a while."

"But you like him?"

(Y/n) looks at him before she averts her eyes to the pond. "He is the only person I can't have." Sukuna pays attention to her stories of how and when she met with that man. She really shouldn't trust someone so easily like this. "I want to live here, but I don't want to live with him. I don't even know what I should say to him so that I can leave that mansion."

Both of them stay silent, until Sukuna speaks. "I'll help you then."

(Y/n) furrows her eyebrows. "How?"

"By staying by my side."

"Are you single?"

Sukuna laughs. "Why? You think I would have a secret life where I have a wife and a child like the man you like?"

(Y/n) shrugs. "It won't hurt to be cautious."

"I have no one. So if you would, you can come with me."

"Why are you so kind to me? Do you like me or something?" She asks jokingly.

"I don't know."

(Y/n) and Sukuna looks at each other, before finally (Y/n) looks elsewhere. Sukuna looks at the sky. It's already dark. Time sure flies when he is with her.

Sukuna stand up. (Y/n) looks at him. "Let's go watch fireworks. I'll be your partner for today."

She smiles as she takes his hand. "Lead the way please."

Sukuna smiles. "With pleasure."

Both of them are enjoying themselves as they stare at the fireworks festival, after they try every food stall at the festival. (Y/n) stares at the fireworks with an awe while he just stares at her without minding the fireworks. Sukuna never knows what fun is until she meets her. It's like she is the light he has been waiting for. When he looks at her smile, he feels his heart skip a beat. But how can a monster like him have a feeling. Especially to a human girl.

(Y/n) claps her hands and glances at Sukuna. "It's pretty, right?"

Sukuna smiles softly at her. "Indeed."

Somehow she feels her cheeks and ears are so hot. Sukuna chuckles as her face turns red. (Y/n) glares at him and looks at the fireworks again. She doesn't even notice that Muzan is standing not so far from them. While Sukuna feels his presence nearby from before they watch the fireworks, he deliberately looks at him, and smirks.

Muzan keeps glancing at the windows. He wants to meet (Y/n) as fast as he can. But the sun hasn't set yet. He sighs as he looks at the ceiling. Akaza who is standing behind him eventually speaks up his mind.

"What's bothering you, Muzan-sama?" Muzan glares at him, so Akaza immediately kneels. "Pardon me if I ever say anything wrong, Muzan-sama."

Muzan taps his index finger on the table. "Akaza."

"Yes, Muzan-sama."

"What kind of feeling do you have for your wife?"

That's a sensitive topic, but he couldn't care about it or how he might feel. Akaza grip his hands.

"I don't know since my feelings when I've become a demon vanished." Muzan stays silent. "But... I still remember her, her smile and her scent. And it makes me feel uncomfortable thinking about it. However, humans call it love. Since you feel stuffy in your heart and wanting to be with the one you're thinking about."

"Love, huh?" He mumbles.

Muzan hurriedly goes outside when the night comes. He wants to meet (Y/n). If this feeling called love is true, he wants to tell her that. What kind of face she would show him? Will she accept his feelings? He keeps thinking about it. Before, he didn't know what this feeling was called, and now that he knows, his moments with her for the past six months feel magical and warm. He can smell her nearby, but when he is about to approach her, someone sits next to her. And she smiles so brightly, the one he never gets to see.

That man is not a demon nor a human. He feels so different. Muzan​​​​​​ follows them, and then he sees her face turning red. Muzan grits his teeth, and when he looks up again, he sees that man smirking at him.

It's almost midnight and (Y/n) just arrive to Muzan's mansion. She thinks that Muzan probably already asleep or he might as well go to his wife right now, but she's wrong. He sits on the chair with his arm crossed as he glares at her.

"Muzan?"

"Where have you been?"

"I told you that I'm going to buy some books and wa..." Then she remembered that he wanted to see the fireworks together. "Did you perhaps..."

"You seem to be having a lot of fun with that man more than I expected," he says as he approached her.

"Well, it just happened," she says as she moves backward. She doesn't deny his accusation.

"Who is he? You seem to know him well for you to smile like that."

"He is someone I know."

He scoffs. "So today is not the first time you guys meet each other, huh?"

(Y/n) doesn't realize that he already pin her when her back touches the wall, she furrow her eyebrows. "Why are you acting like this?"

"I hate it," he mumbled.

"What?"

"I hate that you are close with another man."

(Y/n) just stares at him. "Why? It's not like I married someone else." This time Muzan looks at her, confused. She sighs and pushes him away from her as she walks away. "I saw you. At town, with a beautiful woman, and a child."

Muzan widens his eyes, so he was right. The woman he saw that night was (Y/n). "(Y/n), that's not..."

(Y/n) turns her body to face him. "Muzan, from the past six months when you lived with me and Grandpa, you know that I... I have a feeling for you, right?"

"What feeling?"

(Y/n) looks at him, disbelieve. Even in this situation, he still pretends that he doesn't know anything. "Are you for real?"

"What feeling?" He asks again. "I don't know anything about the feelings that you're talking about."

"If you don't know, it's fine. Let's forget about it."

Muzan grabs her hand when she is about to walk away again. She glares at him. "Explain it to me."

"Don't you hear me? You can forget about it."

"(Y/n)!" He shouts at her for the first time.

She looks surprised at first but then she maintains her composure again. "Do you love your wife?"

"What?"

"Muzan, if I were you I wouldn't want to have a child with someone I don't even love."

"What is that supposed to mean?"

"It means you love your wife enough for you to have a baby with her."

Then Muzan realizes why she is being unreasonable like this, she thinks that he loves that human, she keeps calling his "wife". Muzan makes a fast decision to kill her and her child later. They are just his decoy to live among the humans, and he doesn't have any compassion for both of them. They are just like a doll who he can replace anytime. But not with (Y/n). Never her.

"Are you being like this because you are jealous? Is this what you human called jealousy?"

"Human? Aren't you human as well?" (Y/n) then widens her eyes and looks at him. She remembers that Sukuna mentioned the characteristics of the demon. They can't walk under the sun, don't eat human food, pale white skin, and are very strong.

"Please don't," he says as if he knows what she's thinking right now.

"Are you... a demon, Muzan?"

"(Y/n)," he calls her name helplessly.

"My Grandpa knows you, he even bowed at you. Why? Have you ever met before? And why do both of you never even go outside unless it's dark outside?" Muzan grips tighten on her hand. She widens her eyes as she looks at him in horror.

He knows that she finally realizes what he is. "Let me explain it to you."

(Y/n) pulls away from him. "Are you the one who killed the entire family at the mountain? Those pitiful children?!"

"I need to survive. I have to."

"By killing them?!"

"(Y/n), I was reckless. I have to eat to survive."

"Eat? Eat a human?! Not killing them, but you also eat them?!" She really can't believe it. "Then what about your wife and child? Are they demons too?" Muzan stays silent. "Are they human?!" (Y/n) pushes him away from her.

"(Y/n), I can't change who I am."

"Then are you going to kill me as well, Muzan?"

He widens his eyes. "I would never kill you!" Muzan sees that her body is trembling. She is afraid of him. He is about to approach her again until she speaks.

"I don't want to talk about it again. I'll go back to my room."

Muzan let her go this time, as he sighs. He doesn't want her to find out about him. He wants to keep her oblivious about who he really is. He wants to keep her by his side, for eternity. But she is a human. Muzan walks toward the window and looks at the sky. Then he decides that he will turn her into a demon, so they can live for eternity together.

But he knows that she would decline his offer right away.  Many days have passed, but (Y/n) still ignoring him. At one point she even tries to run away from him in broad daylight, the time when he is so vulnerable. But to her surprise, Muzan forced himself to run outside, ignoring the burning pain all over his body just to hold on to her. That is the first time she sees him suffer, not that long since his regenerations are so fast, but she is convincing herself not to pity him. After a few failed attempts, she finally gives up, and starts avoiding him.

But he is still afraid that she will run away again so Muzan takes a precautions and commands Azaka to protect her, to make sure she doesn't go outside, in fear that she will meet with that mysterious man. Or worse, disappear from his life. He even goes to her room every three hours just to make sure she is still there. Once, she goes to walk at the garden while admiring the moon when she sees Muzan strides toward her. His face clearly indicates someone who is worrying about his lover. But he is not a human, and she is not his lover.

Every time he thinks that (Y/n) spending her time too long at the garden or library, he would go to her right away and forces her to go to her room. And she hates that he is so obsessed and dominated toward her. Moreover, she overheard Muzan and Akaza's conversation, that Akaza already killed his wife and child at his command.

"I see," Muzan says calmly.

She immediately runs toward her room and cries so hard, since it is as if she is the one who killed them, not Muzan or Akaza.

"(Y/n), put that away," he says, worries. Since he sees (Y/n) try to take her own life with a knife on her neck.

"I can't do this anymore, Muzan," she says as tears fall down to her cheeks.

"Do you think if you kill yourself, you will be free from me?" He asks. (Y/n) furrows her eyebrows. "Even if you are on the verge of death, I will resurrect you again with my blood. So that you can't leave me! So that you will turn into a monster you hate so much like me!! Go ahead and do that, but I will never even let your soul leave me!!" He threatens her.

She scoffs and drops her knife after pondering about what she should choose. But she is better off as a human. "What a monster you are," she says before she faints.

It has been one month since they talked to each other. At night, Muzan will come to her room to sleep with her as he whispers to her how much he loves her. But she feels nothing instead of disgust although she endures it. She is never the one who seeks for him, until one day, (Y/n) willingly come to his office.

"(Y/n), why are you here?" he smiles widely.

"I ran out of make up and stuff. I want to go outside before it gets dark."

His smile fades. "No."

She sighs. "Why?" He doesn't respond. "Why can't I go outside?! It's not even dark, and there will be no demons around this time. Why can't I go?"

"It's for your own good."

(Y/n) shakes her head. "Yours, not mine," she says as she points at him with her finger.

"(Y/n) Ageha!"

Both of them sigh in unison. Then Muzan stands up and walks toward her. And her instinct makes her move backward. Muzan stops his track, she is still afraid of him even though he keeps telling her not to. And convince her that he would never hurt or kill her no matter what.

"What should I do to make you stay with me? What should I do to make you believe that I love you?" he asks, there is a hint of sorrow in his voice.

"You know I can't stay with you, and that love you said, it's not love at all."

"Is it because I'm a monster to you? Is that the reason why you can't accept my love for you?"

There is a moment of silence until (Y/n) look straight at his eyes. "Yes."

After she says that, she goes outside as she slams the door behind her. (Y/n) walks fast to her room and sits on her big bed. What should she do to get away from him?

"So you're still alive."

(Y/n) gasps and stand up before she looks at the window. It's Sukuna who is sitting on her window.

"Sukuna-kun?" Sukuna smiles at her, while she looks panicked. Afraid that Muzan comes to her room out of the blue. She walks fast toward him. "You should never be here," she says.

"Why?"

"Why you ask?!" She keeps glancing at the door. And then she just realized that her room was on the third floor, and Muzan sealed her windows so she couldn't escape. She stares at Sukuna.

"Are you okay?" His voice brings her back to reality when she loses in thought.

"You shouldn't be here. You have to go," then they hear footsteps. (Y/n) pushes him. "Go or he'll kill you as well."

"Who? Your boyfriend?" He snorts. "Let him try."

"Sukuna-kun! It's not the right time for a joke. You have to go!"

"And leave you here?"

"I'll be fine."

"I don't trust that demon," he says, and then he stands up.(Y/n) keep looking at the door. Then Sukuna put his big hand on her cheek to have her attention. (Y/n) looks at him, there is fear in her eyes. "Do you want me to leave? Or do you want to leave with me?"

"I..."

Sukuna stretches his hand toward her. Then the door opens. Muzan's eyes widen as he sees her take that man's hand, and they fly away from his mansion. 

She doesn't realize that her fate is so cruel that she can never escape from two obsessive men, Muzan and Sukuna. While she thinks that she manages to get away from Muzan, in the end she still can't escape her fate from being entangled with other demons.

Muzan never stopped searching for her from the day (Y/n) dare to ran away. He commands all his Twelve Kizuki to get her alive and kills that man. His Twelve Kizuki knows that Muzan is the man who doesn't like something uncertain in his life, so that is why he doesn't believe in love or compassion, and anything related to human feelings. But the moment he meets (Y/n), he begins to change himself. 

Though it is hard for him to stop killing humans and experimenting his precious blood to those human idiots just so he can walk under the sun.

Meanwhile, Sukuna and (Y/n) stays at a small house for a noble far from the city. He casts a spell on their house so no sorcerers or demons can track them down. Sukuna actually doesn't mind if that demon goes after him, but he doesn't want to risk losing that one human to be his possession. He is pondering whether he wants her because he wants to own her, or because he just wants to get rid of stuffiness in his chest when he can't see her. And for the first time in a while (Y/n) feels alive again.

She can go anywhere she wants to go, do anything she wants to do without being watched or dragged away. Sukuna smiles as he watches her play with a dog in the yard. He is proud of himself for finding a house like this after a slight misunderstanding with the previous owner, who is now just a limp dead body in the basement. Along with other sorcerers that try to seal him. So he pays a lot of attention to the basement, just so (Y/n) never steps her foot to that filthy side of the house.

(Y/n) walks towards Sukuna who is still sitting on the terrace, and she smiles at him. "What are you doing?"

"Watching you," he says. (Y/n) blushes before she sits next to him and looks at the beautiful scenery of the country side in front of her.

"Thank you for bringing me here," she says full of gratitude. "You don't know how much I've dreamt about this day."

"Now you can stop dreaming about it, and experience it yourself. The freedom you want so bad."

"Yes." (Y/n) glances at him. "Thank you, Sukuna-kun."

"If you are so glad with my present, can you kiss me?"

(Y/n) widens her eyes. "Huh?"

Sukuna smiles as he puts his hand on the back of her neck and pulls her closer. But he doesn't kiss her right away even though her lips are already a few inches till they touch each other's lips; he is waiting for her signal. (Y/n) can feels her heat beats so fast, she looks at his eyes before she shut her eyes. And Sukuna doesn't waste his time as he kisses her passionately.

His tongue plays with hers, every time she pulls away to get some air, he pulls her head closer to him again. This is the first time Sukuna feels warmth in his heart, and also the first time for him to feel affection towards a weak human girl. Finally, he can have her in his arms.

One year since (Y/n) have left, Muzan already killed so many demon slayers. He searches every corner of this town and mountains, but he still can't find her. He is desperate, he wants to be able to walk under the sun as soon as possible, and find her whereabouts day or night. When he finds her, he will lock her away from the outside world so that she can only rely on him. And he will kill the demons who stole her from him.

"(Y/n)."

(Y/n) smiles to the beautiful lady named Tamayo. She is a good and beautiful doctor in this village who only comes once every month when the night comes. She always helps everyone without getting paid. She wants to be like her, but it seems that it is impossible.

"Tamayo onee-chan."

Tamayo hugs her, and rubs her head. "How are you?"

"I'm fine."

Then she invites her to her house, and prepares the tea for her, and her male assistant. They talk about her journey and stuff. (Y/n) loves it when she talks about people, her job, and the places she went. Sukuna gives her freedom to do that as well, but strangely the one who talks to her is only a woman. When she tries to talk to a man, they all seem to be avoiding her. She confronts Sukuna about that, but he swears that he doesn't do anything.

Yes, he doesn't kill those who try to get close to her, he only puts a curse on them so they will only live a short life as the curse feeding and draining their soul. When they die, the curse will impersonate the one they killed. In fact, all of the people at that village, are not human, but a curse he created.

Tamayo looks at her. She knows from the first time she met her, she's Muzan's woman. The one he has been looking for all this time since she can smell him from her. But now she smells different after she lives with her "husband". He is not a human, nor a demon like her. He is something else, not stronger yet, and feels like something out of this world.

"I don't see your husband, (Y/n)."

"Oh, he says he has to go to the town again."

"Why don't you go with him?"

She looks nervous. "I... I don't really like crowded places."

"I see. Then does he know about your illness?" (Y/n) fidgets, but then she shakes her head. "(Y/n) you have to tell him. We need both of your concerns to do the surgery and remove the cancer on your stomach as soon as possible."

"Can I not undergo the surgery?"

"What?"

She puts her hand on her stomach protectively. Tamayo widens her eyes.

"Will it hurt the baby?"

"Are you pregnant with his child?"

She smiles happily. "Yes."

If Muzan knows about this, then the baby...

"Sukuna-kun doesn't know about my illness or our baby. So will you keep a secret from him? I'll tell him everything myself."

"I understand. But you have to tell me as soon as possible."

After that they leave the house. They don't know that someone is watching them before it disappears. Not long after that Sukuna arrives. (Y/n) greets Sukuna at the door. He feels complete with her by his side. He hugs her immediately. "I'm home."

(Y/n) giggles. "Welcome home." she let go. "The bath is ready."

"Really? Then I'll go take a bath... with you," he says as he lifts her bridal-style. She giggles.

"I did that already."

"Not with me though."

Then he helps her take off her clothes again after he's done with his. They talk and joke as they sit in the bath.

"It tickles," she giggles as he kisses her shoulder and neck.

"I want you, (Y/n)," he says with a hoarse voice. She can feel something hard on her back, and that makes her blush.

She looks over her shoulder and pulls his head closer towards her before she kisses him.

Despite doing it for so many times, her skill still hasn't improved, and he finds it cute. He slides his hand on her slender body to relax her, before he cups her breasts with his big hands and plays with her hard nipples while she lets out a sigh. While one hand on her breast the other one slides down from her stomach to her private area and plays with it until she reaches climax.

"Bend down, (Y/n)." He whispers.

(Y/n) bend her body down, and that is when he enter her slowly as they enjoying this moment.

After he is inside her, he moves slowly. They can hear their own moan in the bathroom. Then he pulls away from her and carries her to the bed, and starts to move inside her again aggressively. She hugs him tightly as she calls his name between her moans.

"Ah... Sukuna... please..." She begs.

Sukuna kisses her neck and licks her ears. "You are mine. Mine, (Y/n)."

"Sukuna..." She cries in pleasure. He knows that she is going to climax again, so he deepens his thing inside her.

"Together."

And they reach climax at the same time. But Sukuna still not satisfied, so he keeps doing that until she passes out.

After a while he finally let her sleep so soundly in his arm. He puts her hair to the back of her ear and kisses her before he stares at the ceiling. He knows that her ex-boyfriend is still looking for her after all this time, so he always goes to town to make sure that no one can track down her scent or his. When he is lost in thought, (Y/n) moves in his arm.

"Sukuna-kun," she mumbles.

Sukuna smiles and pulls her even closer to him. "I won't let you go, (Y/n)."

Then he hears someone knock on the door. Sukuna knows that it is a demon. Muzan finds them.

Muzan stands up when one of his Kizuki finally finds (Y/n) when he is tailing Tamayo. He smiles. "Finally."

He doesn't waste his time and goes straight to her house. When he gets there he wants to break the door so hard but he doesn't want her to be afraid of him when she meets him again for the first time after one year. So he knocks on the door just like a human would do.

She hears someone knock on the door, so she opens her eyes. And she sees Sukuna is wearing his clothes. Sukuna looks behind him and smiles at her before he walks closer to her and kisses her lips. "(Y/n)."

"Hmm?" She is still sleepy.

"We have a guest it seems. You should go and put your clothes on, okay?"

(Y/n) hugs his neck. "Who would come this late?" Sukuna stays silent. (Y/n) let him go and looks at him. "Sukuna-kun?"

She notices his facial expression becomes stiff. And that is when she knows who that unexpected guest is. She gets up from her bed. "Is it him?!"

"You should get your clothes and stay close behind me, okay?" He says as he hands over her new clothes.

She is so afraid right now, yet he looks so calm, she tries to compose herself as well. And she put on her clothes even though her hands are trembling so hard. So Sukuna gave her a hand. After she is done, Sukuna extends his hand, and she gladly takes it.

Muzan is about to knock again when the door slides open. He is now come face to face with the man who stole his lover that day. Then he looks behind him. His eyes meet with her beautiful (your eyes color) eyes. That is when his heart beats so fast again, not because of the thrill of killing people, but something else. Does he still love her after all this time?

"May I help you, Sir?"

Muzan glares at him. "I believe you have something that is mine."

Sukuna grips her hand tighter. "I don't think I understand what you say."

"Her," he points at (Y/n) with his head. "She is mine."

Sukuna smiles. "She's my wife."

Hearing the word "wife" from him, makes him boil with so many emotions called jealousy, betrayed, and hatred at the same time. When he says wife, does it mean they are doing everything a wife and a husband would do at night? Are they having sex while he was trying so hard not to touch her until she allowed him to?!

Muzan looks at (Y/n) again, and she averting her eyes. The next thing Muzan realizes is when he punches Sukuna so hard that the walls break when Sukuna's body hits it.

"Sukuna-kun!" She shouts, and when she is about to go to him, Muzan holds her hand. She glares at him.

"How dare you do this to me, (Y/n)!"

"Let go of me, you monster!"

Instead of letting her go, Muzan pulls her away from that house.

​​​

"(Y/n)!" Sukuna screams her name.

"Sukuna-kun!"

​​​​​​Sukuna run toward Muzan but the ten Kizuki blocked his path. Muzan stands to watch them fight him, while (Y/n) trying so hard to let go from his grip and run to Sukuna. Sukuna is strong indeed, he fights those ten Kizuki alone. But he is still inexperienced when it comes to fighting them. They just keeps resurrect from the dead.

Until finally all of them manage to pin him down to the ground.

"Sukuna-kun," she whimpers.

Sukuna grunts as he tries to escape. Muzan pulls (Y/n) in front of him, making sure that she take a good look at the scene where her savior, her lover, and her husband being humiliated.

"Get your hands off her!" He shouts.

"I have something for you, (Y/n)," he whispers. Then Muzan nods to them.

And what a horrible scene happening in front of her when those ten Kizuki cut his fingers one by one and swallow it. She screams and begs them to stop, but they ignore her of course. She tries to close her eyes and looks away from the scene, but Muzan forces her to look at it. Her body trembles so hard, and she falls to the ground.

"Please..., stop it," she sobs.

Muzan lifts her chin up with his thumb and index finger. "This is what will happen when you leave me, (Y/n). I will kill everyone who associates with you, or those who dare to make me lose you again."

She closes her eyes and tears fall to her cheeks. When she opens it again, Sukuna is already hovering behind them, but his appearance... is different. He has two faces and four arms and marks on his body. Then he lifted his hand and hit Muzan away from her. (Y/n) doesn't move. She only stares at the husband in front of her. Sukuna knows that she is staring at him, but he can't bring himself to turn his head toward her, and show her his hideous form.

​​​​"Sukuna-kun?" she calls his name.

(Y/n) tries to get up, and when she manages to stand, she walks toward him. But Sukuna ignores her. With trembling hands, she touches one of his hands.

"Look at me..." She begs. "...please?"

Finally he turns his back and looks at her, strangely there is a sign of sadness in his eyes. But Sukuna doesn't realize what kind of face he makes right now. (Y/n) takes a closer look at him, and she caress his cheek.

"(Y/n)."

She immediately hugs him as she sobs. And without a second thought, he does the same.

"Don't touch her!" They hear a scream behind them, it is Muzan's.

Muzan appears from the darkness of the trees. His clothes rips here and there, so he rips off his clothes anyway. (Y/n)'s body become tense when she sees so many red mouths with sharp teeth on his arms. She would never have imagined that she could attract monsters like Muzan and Sukuna in her life.

Sukuna stands between them, positioning himself in front of (Y/n).

​ ​ ​ ​ A drop of water from the sky touches her nose before she can hear thunder from a distance. Rain. What a timing.

"(Y/n)," Muzan calls her name. She peeks from behind Sukuna's broad shoulder. He extends his hand. "Take my hand and come with me."

"Never."

He grits his teeth. "Come!" He commands. "I will not say it again."

Sukuna hides her body behind him again. "Enough. Go. Before you regret it."

The next thing (Y/n) knows, Muzan already in front of them, and Sukuna grips his neck before he can grab (Y/n). He flies while strangles Muzan with his hand and throws him from the sky. Muzan uses his blood art to make weapons and Sukuna dodge it. The battle, the rain, and the thunder seems endless for her. But then she feels an immersive pain in her stomach.

"Urgh," she whimpers as she touches her stomach. She feels something warm slides down her feet, when she looks down, she widens her eyes. Blood.

"No," she mumbles.

Muzan smells the blood and he averts his eyes towards (Y/n), same with Sukuna. Sukuna widens his eyes and he hurriedly goes to her. When he is beside her, he holds her trembling body.

"(Y/n), are you okay?!" (Y/n) looks at him before she whimpers in pain again. This is the first time she sees him panic like that, but she doesn't have the strength to joke about it or even speak right now. So she holds his hand tightly. Sukuna notices the blood on her feet.

He remembers that she doesn't get hurt while he sparring with Muzan since he makes sure to transfer his own protection shield to her. And by the looks of it and the way she holds her stomach... realization hits him. She is pregnant with his child! But not anymore if she doesn't get treatment right away. He carries her weak body in his arms.

"You'll be okay," he whispers.

But when he is about to fly with her in his arms, Muzan pulls his feet down so hard that both of them fall to the ground.

(Y/n) screams in pain as her body hits the big tree. Sukuna screams her name. He then fights with Muzan again, he wants to finish it quickly and go to her aid as soon as possible. And that is a chance for Muzan to attack him over and over again.

(Y/n) cries in pain, the pain is all over her body, and her vision becomes blur, but she tries so hard to stay awake, until she sees the horrid scene where Muzan grabs him by the neck.

"No..." she says weakly as she tries to get up. But she keeps falling. "Let him go, Muzan!" She shouts. "Please," she begs as she forces her aching body to kneel.

"Get up!" Sukuna says as he grit his teeth.

Muzan looks at her over his shoulder. "I don't like someone touching what's mine," he says before he stabs his chest, then he pulls his heart out of his body and burns it on his hand, leaving him lifeless. While Muzan smiles so wide. (Y/n) screams and call out his name, but he don't move at all.

"Sukuna! Sukuna, wake up!"

Muzan walks toward her and grabs her by the neck. She grabs his hand on her. "Never. Leave. Me. Again!" He makes sure that she remembers every word he says right now.

Tears fall to her cheeks, and she glances at Sukuna's body again before she passes out.

(Y/n) is unconscious for a few days. Muzan who is impatient kills the doctors who don't give him a satisfaction answer. She is in a coma right now, he can see that, and he is glad that that bastard baby will never be born in this lifetime. But he wants her to wake up as soon as possible. He sighs and sits on the bed; touches her hair gently. Even between life and death, she still looks beautiful. 

He slides down his fingers to her cheeks, lips, and when he reaches her neck, he puts his slender fingers around it.

Oh how badly he wants to kill her, no... better yet, hurts her like the way she did to him all this time. How could she leave him? How could she dare to have another man's baby when he never touched her like that? What is so different from him and that man? He has so many questions he wants to ask. He stares at her for a while before he lets go of her neck since he remembers that one of the doctors says that she might die soon because of her illness.

Muzan looks outside of the big windows on his right. After thinking so hard, he bites his own lips until it bleeds, before he moves his head closer to her.

"This is my revenge," he says before he kisses her, and gives her his blood. He wants to kill her, but the urge to save her is way bigger than his anger. He can't live without her. So he better let her suffer for eternity by his side. He doesn't care even if she hates him or curses his existence, as long as he can always be with her.

Her eyes flutter open, and then she gets up and coughs up blood. She feels something burning inside of her chest and throat, so she holds her neck tightly, almost choking herself if Muzan doesn't pin her hands to the bed. She looks at Muzan, her vision a little bit blurry because of the tears in her eyes.

"Mu... zan. What..."

Muzan just stares at her as she screams in pain in front of him.

Is this the scene he wants to see?

Is he happy when she is hurting like this?

He is baffled with what he actually wants from her, but then he reminds himself that this is her punishment, and he shouldn't regret giving it to her.

When the pain died down, she slowly opened her eyes. The ceiling looks familiar to her somehow. She grunts when she tries to get up. She takes a good look at her surroundings until she realizes, this is her room back when she still lived with Muzan.

"Sukuna," she mumbles.

When she hurriedly gets up, she winces when her head hurts and strangely she can see pieces of Muzan's memories, including his fear, and her own collides inside her head.

"What was that?"

She doesn't pay any attention before but when she comes to her senses, she realizes that her hearing, her vision, and her body, somehow feels... unusual. She looks around and finds a mirror.

She reluctantly walks towards it, and when she stands in front of the mirror, she doesn't even know who is the beautiful pale girl that is staring at her through that mirror. She touches her cheek, and red lips.

"Do you like the new you?"

(Y/n) looks at Muzan from the mirror. He is leaning to the door with arm crossed.

"What did you do to me?" Muzan shrugs.  "Answer me!"

Muzan glares at her, the thing he never would have done in the past. And when he does that, her body becomes trembling with fear as she falls. She succumbed to him.

(Y/n) tries to get up, but she can't. Muzan walks towards her and stands in front of her. "You want to know what I did to you?" (Y/n) looks up at him. "I turned you to be a monster that you hate so much," tears welling up to her cheeks when she finally understands that she is no longer human. 

Muzan smiles wickedly. "Welcome to my world, (Y/n). Where you would want to feast on human flesh everyday."

"Why?" She sobs. "Why did you do this to me?" She glares at him. "Why?! Why?! Why?!"

"Because I want to make you suffer. I already killed that beloved husband and child of yours. And turned you into a monster like me. You will suffer in my arms again and again, until you never dare to leave me," he threatens her.

"Why me?"

He squats down, and lifts her head before he gives her a brief kiss. She is too tired to fight him.

"Because I love you," he says, almost like he whispers.

She looks into his eyes, his eyes don't seem to lie. But does he really know what love is?

(Y/n) shakes her head. "This is not love, Muzan."

"(Y/n) once you belongs to me, you'll be forever with me. Even if you are dead somehow, I will find you over and over again and claim you as mine for so many times, until the one that is engraved to you is only me. This is the only way for me to show you how much I love you!"

He sighs before he stands up. 

"Now get up. I'll show you how to hunt a human," he extends his hand in front of her.

She clenches her hands. She will never hunt humans, instead she will learn and hunt demons, especially demons in front of her.

\= Present time \=

21st century

Today's weather is really nice. The birds chirp as if they are singing a love song, and the breeze feels soothing. (Y/n) takes a deep breath of the fresh air as she stares at the sunrise, while her (your hair length) moves gently because of the wind. She looks at it for awhile, before she sighs.

"Do you want to go buy coffee, (Y/n) nee-chan?"

(Y/n) turn around. "I'd love to, Nezuko-chan."

Both of them then decide to go to the nearest coffee shop, they add something to it when the coffee arrives. It is a drop of human blood. She stares at Nezuko, her family was wiped out because of Muzan, the one who died in her hands. Now they are the only demons who can walk under the sun, and they are the new generations of Demon Slayer.

When they are chatting and laughing happily at the terrace of the cafe, a group of idiot people are laughing noisily. Nezuko clicks her tongue.

"I want to go home, Nee-chan."

"Okay, let's go home."

Both of them stand up, and try to get away from those noisy students and their looks-like-an-idiot teacher.

But then her heart beats faster when she feels a strange feeling from the pink-haired man after their eyes meet each other. She stops moving and the only thing that matters is only him. It is the same feeling as when she met Sukuna. She reminds herself that Sukuna has gone over and over again, and that she should forget about him.

"Nee-chan, what's wrong?" asks Nezuko.

"Nothing," she smiles. "Let's go."

Yuji Itadori stares at (Y/n)'s back. Then he looks at Sukuna's soul, who strangely stares at that woman so intensely while usually he always sits as his cheek leans on the back of his hand.

"Sukuna?" Yuji calls him.

"Switch with me," he commands.

He finally finds her, his wife. The love of his life, and he will never lose her again this time. Never.

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