Yoichi can't stop loving his wife, Yuko, but lately Atch has no energy. Yoichi, who was worried that Yuko would run out of love if this continued, secretly buys an aphrodisiac. However, while Yoichi is away, Yuko and her son, Kota, drink a drink containing an aphrodisiac. Yuko, whose body heats up and her uterus starts to ache, and Kota, who gets an erection, gradually lose their reason and violently seek each other in a physical relationship. The two drowning in pleasure realize that the cause of the mistake was an aphrodisiac.