Takeshi Karagi fulfills a client's forbidden desire by producing a consanguineous incest-themed work. The client wishes to have sex with his younger sister, and to make it happen, an accomplice posing as her affectionate older brother brings her to a massage parlor, luring her into a sensual massage session. The entire establishment and staff are fake, and she unknowingly surrenders her body. As sensitive areas are touched, her body naturally reacts, her breathing becoming ragged. A powerful vibrating device is applied to her groin, wetting her genitals as she struggles to suppress moans, yet her arousal intensifies. With her vision blocked by an eye mask, the "brother" appears as an assistant, and together they stimulate her simultaneously, making her pant heavily. She is penetrated by her brother, experiencing pleasure without knowing his true identity. After achieving his goal, the brother switches places with the masseuse, and she is thrust into violently, writhing in ecstasy as she repeatedly cries out how good it feels.