Mastermind

1 The Groom 

2 Our feelings are mutual 

3 Aloof Girl So-Jin 

4 We are strangers 

5 Not your typical Girl 

6 Encounter 

7 You make my heart Flutters 

8 First Friend 

9 Team Up with Me 

10 Jealousy 

11 Jealousy Part 2 

12 First Move 

13 Hear me out 

14 Devil Husband 

15 I am sorry 

16 Jealousy Overload 

17 Suspicion 

18 Calm Before the Storm 

19 Revelation 

20 Revelation Part 2 

21 You Belong to me 

22 Contract 

23 New Routine 

24 Smile Just for me 

25 Joo 

26 Party 

27 Party Part Two 

28 Sharing one Bed 

29 She is my past 

30 I am Married 

31 I do not Love him 

32 You will be mine 

33 Possessive Husband 

34 Encounter with Joo 

35 Lies 

36 Anger 

37 The Truth 

38 I am still angry 

39 He is back to normal 

40 Episode 40 

41 Plans 

42 Getting Closer 

43 Meeting His Parents 

44 Emotions 

45 Reunited 

46 Weird Friend 

47 I want to spend time with you 

48 Holiday for real 

49 Wedding Ring 

50 Connie X Byung Wook 

51 Slow 

52 Your gift 

53 Merry Christmas 

54 Old Acquaintance 

55 Pay Back Time 

56 Commotion 

57 Busted 

58 Confession 

59 She's Oblivious 

60 Move with me 

61 A little bit of Sweetness 

62 Temptation 

63 Happy Times 

64 Undelivered Feelings 

65 One step at a time 

66 I love you 

67 His Feelings 

68 One night 

69 Our time 

70 Good Times 

71 Chances 

72 Day Hyun Fiance 

73 New Classmate 

74 Danger 

75 Naughty 

76 Abduction 

77 I Am Worried 

78 Forgiveness 

79 Happiness 

80 Gathering 

81 Sweetness Overload 

82 Be my Girlfriend 

83 Monica’s story 

84 True Friends 

85 Double Sweetness. 

86 Yoshino 

87 New Member 

88 My lucky Charms 

89 Schemes 

90 Problem after Another 

91 Byung Wook Desires 

92 First Victory 

93 Embarrassment 

94 Evil Plans 

95 Engagement 

96 Hatred 

97 Monica X Da Hyun 

98 Summer 

99 Captured 

100 Mastermind 

101 Rotten to the Core 

102 It's over 

103 Divulgence 

104 Back To normal. 

105 Book 2 

106 Bachelor’s party 

107 Wedding Day 

108 First Day 

109 Monica is Back 

110 It Hurts 

111 Disappearance 

112 Panic 

113 Second chance Please 

114 Still Husband & Wife 

115 Paranoid 

116 Wavering Feelings 

117 Connie’s Plan 

118 Surprised 

119 Surprised Part Two 

120 So-Jin’s Career 

121 I keep Missing you 

122 Friendship or love? 

123 Stay Close to me 

124 I am here 

125 I hope It's easy 

126 Sabotage 

127 Pain and Sufferings 

128 You're Selfish 

129 Childhood Friend 

130 Ho-Jin’s weakness 

131 Camille 

132 Two months to prove my worth 

133 Bitterness 

134 Author Announcement 

135 Do you want to marry me? 

136 Childhood Memories 

137 Broken Heart 

138 Project Baby Making 

139 Finally 

140 Acceptance 

141 Additional Family Member 

142 Surprise + Surprise + Surprise 

143 Ho-Jin’s Plan 

144 Ho-Jin’s plans part 2 

145 That was a good one 

146 So-Jin and Geun Past 

147 Proposal 

148 It was worth the pain 

149 Happiness 

150 Happy Ending 

151 Episode 151 