Takeshi Karaki steps in to fulfill the wishes of a client who wants to have sex with a relative... the entire incestuous plan is secretly filmed! The request comes from an older brother who can no longer contain his desire after learning that his younger sister, a university student living with them, works at a cabaret club. The massage begins fully clothed, and once she's relaxed, she changes clothes and receives an oil massage. She is embarrassed when oil is applied to sensitive areas, but when she accepts the treatment on her breasts, her hips start to tingle and her breathing becomes heavy. When her vagina is fondled, she writhes in agony, climaxing violently, and then climaxes as he thrusts into her. The blindfolded younger sister unknowingly sucks her brother's penis, who has appeared as an assistant, and when he thrusts into her, she begs him to thrust harder, climaxing in convulsions.