Mary Tachibana is a married teacher who treats her students with kindness, while her husband remains cold and strictly disciplined in his teaching methods. This stark contrast defines her life, and she grows increasingly dissatisfied with his distant attitude. One of her students, Gouda, becomes infatuated with her and secretly photographs the two of them embracing. Holding the incriminating evidence, Gouda forces Mary to choose—protect her husband or submit to him. Pushed to the edge, Mary finds herself stripping off her clothes right then and there, trapped in an extreme, helpless situation.