Yoichi is in love with his wife, Yuko, but lately he's not feeling well. Yoichi, worried that Yuko will lose her sociability, secretly buys an aphrodisiac. However, Yuko and her son Kota drink an aphrodisiac drink while Yoichi is away. Yuko, whose body is hot and her womb begins to ache, and Kota, who erects, gradually lose their reason and get into a physical relationship. Drowning in pleasure, the two realize that the cause of their mistake was an aphrodisiac.
