Oota Toomi

Io Sado, a member of the occult research club, is curious about his classmate "Attendance number 0", who is noticed by no one. When she invites her classmate to join the occult research club as usual... An encounter between two people that shakes the world. A coming-of-age occult battle begins.

Jinsei Oomuta is a second-year high schooler and his teachers are worried about him because he always has a lot of injuries. But his injuries are caused by a "certain duty" he has that he can't tell others about... Source: Shogakukan