After fifty consecutive job-hunting rejections, a cynical female college student named Kikumura Risun decides to exploit the desperation of others. She sets up a fake confession booth, charging ten thousand yen per session, and begins accepting clients who carry unimaginable secrets. The premise is built around a rotating cast of visitors who reveal their darkest acts: a husband who, driven by love, dismembers his wife; a devoted fan who murders someone who slandered their idol; a man who has been "too kind" his entire life until his patience finally explodes into violence; and a poor man who makes a life-or-death decision for the sake of his beloved cat. Each confession unveils a secret so extreme that it borders on the monstrous, and the consequences are both terrifying and heartbreaking. The story is grounded in the modern world, with the confession booth serving as a stage where ordinary people spill their most twisted truths. Kikumura herself is the central recurring figure, a young woman numbed by failure who initially sees her scheme as a quick way to make money, but she gradually becomes entangled in the lives and fates of those who come to her. The narrative arcs are largely episodic, each focusing on a different client and the chain of events that led them to commit acts of horror. The tone blends psychological dread with emotional weight, earning the label of "people horror"—a type of fear rooted in the darkness that ordinary humans are capable of hiding beneath the surface.