Devastated at the death of her four-year-old daughter, a grieving middle school teacher is horrified to discover that her students aren't as innocent as she thinks.

Detective Takeo Kosai is about to be demoted. He then plans to entrap Akira Dojima without his partner Detective Emi Ishikawa's knowledge. Akira Dojima kidnapped and killed a girl 15 years ago

Airi is a high school student. On the way home from school, Airi is kidnapped by someone. Then, 9 more high school students are all kidnapped like Airi. Those kidnapped students are forced to participate in Jinroh Game, with their lives at stake.

Seiji Hasumi is a popular English teacher in a private high school. He is also a violent and sociopathic killer who concocts an extreme plan to deal with the rise of bullying and bad behavior among the student body.

An old cafe nestled deep in the mountains. Three eccentric regulars enjoy hanging out at the cafe with the cheerful and dynamic proprietress Mariko. But, there's a scary rumor that the cafe's customers keep disappearing…