Female teacher Aki is blackmailed by her student after he discovers her secret part-time job. With no choice, she is forced to cooperate, gradually exposing her body against her will. Fingers and penises are thrust into her untrained anus, making her scream in intense pain and humiliation. Through this process, she slowly transforms into a complete masochistic slave. Ultimately, she is reduced to a pitiful state, covered in filth and defiled. Her body is no longer her own, completely dominated by others. This film is a shocking story that exposes her total degradation.