Confessions

A junior high school teacher who confronts a devastating personal tragedy by orchestrating a public confession. She believes teachers must make students confront their actions, even at immense personal and ethical cost. Her method—injecting HIV-positive blood into milk—reveals a willingness to cross moral lines to force accountability. Her resolve is tempered by introspection on the consequences of vengeance.

Student A, a bright but disturbed pupil with a talent for crafting dangerous devices. He taunts and toys with authority and danger, seeing science as a means to prove himself. His actions escalate from manipulation to real harm, including killing Mizuki and orchestrating plans that threaten others. He remains emotionally volatile, driven by a need for recognition and mastery.

Student B, quiet and initially compliant, who becomes an active participant in the murder scheme. He helps Shuya test the device and ultimately commits the crime against Manami by dumping her into the pool. Naoki's later actions—killing his mother—reflect a deeper rebellion against family shame and societal expectations.

A classmate who identifies with the victim and becomes entangled with Shuya. She suspects Yuko’s claims and questions the plausibility of the milk contamination theory. Her vulnerability and curiosity draw her closer to Shuya, ending tragically when he kills her and preserves parts of her body.

The four-year-old daughter whose death at the school pool provokes the entire sequence of events. Her loss is the emotional trigger for Yuko’s drastic choices and the unraveling of the students’ lives. Manami’s presence haunts the narrative as a symbol of innocence corrupted by adult actions.