The darkish fantasy follows a highschool sophomore named Akihito Kanbara. Although the boy seems human, he’s half Youmu and invulnerable to wounds as a result of he can heal rapidly. One day, Akihito meets freshman Mirai Kuriyama when it appears she is about to leap from the college rooftop. Mirai is remoted due to her capability to control blood, which is taken into account heresy amongst members of the spirit world. Disturbing occasions start to unfold after Akihito saves Mirai.