You steal a gym uniform on impulse and spend the next thirteen episodes watching your entire life collapse under the weight of that single moment. Kasuga doesn't get to escape what he did, doesn't get to move past it, doesn't get to be forgiven, the show won't let him, and it won't let you either. The rotoscope animation makes every frame feel like a confession trapped in amber, a boy suffocating under the consequences of something he can't take back.
Kasuga Takao is a quiet bookworm whose world revolves around poetry, especially Baudelaire, and an admiration from afar for his classmate Saeki Nanako. His life changes the moment he steals her gym uniform on a sudden impulse, and he is soon consumed by shame and guilt. But he's not alone in knowing what he did. Nakamura, the strange, friendless girl of the class, saw him take it. Instead of exposing him, she sees a fellow deviant in him and uses what she knows as leverage, blackmailing him into playing along with her disturbing fantasies. What unfolds is a psychological spiral in which Kasuga hopes to get closer to Saeki and atone for what he did, while Nakamura keeps interfering. As their bond grows darker, even Saeki is drawn into the nightmare. Can Kasuga break free, or will he go along with whatever Nakamura has planned?