Kakeru Kurosawa, a disdainful 14-year-old, harbors a secret habit of using erotic fantasies about his female classmates for self-gratification in a secluded school bathroom. When he witnesses bullying, he takes matters into his own hands by seeking revenge on the perpetrators. However, his actions lead to unexpected consequences when the victim, Aya Kitahara, blackmails him into targeting other girls. Forced into a cycle of intimidation, Kurosawa grapples with the complexities of bullying, retribution, and personal transformation in a gripping tale of adolescence.