Natsushima Yui, a popular and kind-hearted student with a strong sense of justice at a prestigious all-girls high school in Tokyo, is asked by her friend Reiko to help out with a part-time job at an event. Unwittingly, she accepts, only to discover the job is actually a degrading live show demanding she perform orgasms on display. Completely innocent, Yui is tightly bound, forced to expose her genitals, and made to climax repeatedly against her will. What follows is the most nightmarish experience of her life—a horrifying mix of humiliation and shame as she is pushed into relentless, torturous ecstasy.