At the request of her stepfather, Daigishi Karagi begins covert surveillance to carry out a consanguineous incest plan. Targeting a 20-year-old college student working part-time at a maid cafe, he arranges for her to be taken by her stepfather to a massage parlor under false pretenses, claiming the treatment will help slim her lower body. As the intense massage continues, her breathing becomes ragged. Blindfolded, she is penetrated against her will and, despite resisting, is overpowered with a vibrator until she loses consciousness. Unaware that her stepfather has taken over, she reaches climax repeatedly. Two weeks later, the daughter contacts them again, requesting another visit—this time not for massage, but for direct sexual intercourse. Penetrated once more, she is overwhelmed by pleasure, climaxing again and again.