Akihito Kanbara is half-yomu with a self-healing ability that makes him almost impossible to hurt, and he's grown reckless because of it, until he meets Mirai Kuriyama, an isolated transfer student who fights using blood she pulls from her own body. He talks her down from a rooftop ledge on their first meeting, and the encounter pulls both of them into the hidden spirit-hunting world that the Nase family quietly polices around their school, where Mirai, the last of a bloodline shunned for its cursed powers, has to make her own way.