Blood on the Tracks ⁽¹⁷⁾

Seiichi Osabe is a shy middle school student who lives an ordinary life under the care of his mother, Seiko. While others perceive Seiko as overprotective, Seiichi is entirely comfortable with her profound devotion and does not question her behavior. During a family hiking trip with his parents and paternal relatives, an event occurs that irrevocably shatters his peaceful existence. His cousin, Shigeru, playfully shoves Seiichi near a cliff edge, prompting Seiko to instantly intervene and pull him to safety. The family dismisses her actions as excessive and laughs at her response. Later, Seiichi and Shigeru venture to a higher, more precarious cliff edge. As Shigeru stands near the edge, Seiko, who has been following them, approaches her nephew and deliberately pushes him from the cliff. She then turns and offers her son a brief, tranquil smile. In the aftermath, Shigeru is left in a comatose state, and Seiichi remains the sole witness to his mother's true nature. This incident forces him to recognize the terrifying and dangerous reality of his mother's affection. His daily life is transformed into a continuous horror, as he must navigate an existence dominated by the disturbing and possessive protection of the person who claims to love him most.