An intelligent high school student goes on a secret crusade to eliminate criminals from the world after discovering a notebook capable of killing anyone whose name is written into it.
Hachimitsu Academy, once an all-girls school, has become co-ed, and teen Kiyoshi is one of five boys to enroll. When he is caught peeping, Kiyoshi is sent to the schools prison, where his punishment is carried out.
After performing a charm that would supposedly unite them as friends, a group of students are teleported to the mysterious Heavenly Host Elementary School where they are visited by the spirits of the school's murdered students.