Apartment resident Ichijo Mio was having an affair with a man while her husband was away. One day, the manager Sugura became suspicious of Mio's behavior and caught her in the act. He photographed her bound, subjected to SM training, and being penetrated. The manager used these photos to blackmail Mio into becoming his ideal rape sex slave. Furthermore, Mio's lover, Sanada, also moved into the same apartment and conducted rape training while her husband was away.
