Enter Hikari "Hikaru" kanzaki. His mom was an idol before getting killed by a obsessive fan, and after that him and his sister Katsuko were taken care of by the stage producer, Mika Asagiri.
Now about to graduate hagihara high, when something strange happens. Maledictions - an "illnesses" that causes people to get special powers against their will, taking the form of monsters before taking control of their host, - are spreading like wildfire!
After an attack at the hospital he was at, visiting Katsuko because she was hospitalized due to her malediction. He gains one. And surprise, it's the strongest.
Now being hunted down by Ryu Yukishiro-a malediction user with an ability to control the spirits of the people he's killed-, he has to choose between going to the arena to fight in Tokyo, or his hometown in Kobe.
But first, he has to keep his malediction a secret at his school, but that isn't easy when it's obvious!
Hikari sighed.
