To fulfill a client's desire for incest, Taki Takefumi devises a plan to secretly film GOS female staff members engaging in forbidden sex with their own brothers. Enlisting staff cooperation, the operation begins. At a fake massage parlor, the female employee is forced into the experience, gradually losing control as her body responds and her panties become soaked. Her shaved pussy is then penetrated, and despite her shock, she is vigorously fucked. Blindfolded, she continues with her brother, but when the blindfold is removed, confusion and mental breakdown follow. Later, after further consultation, she has sex again with staff members, reaching climax repeatedly. It is ultimately revealed that the woman is actually a willing participant who enjoys such acts.