Yoichi loves his wife, Yuko, but she hasn't been feeling well lately. Worried that Yuko will lose interest in him if things continue this way, Yoichi secretly buys an aphrodisiac. However, while Yoichi is away, Yuko and her son, Kota, end up drinking a drink containing the aphrodisiac. Yuko, whose body becomes hot and whose uterus begins to ache, and Kota, who gets an erection, gradually lose their reason and intensely crave each other, leading to a physical relationship. The two, intoxicated with pleasure, realize that the cause of their mistake was the aphrodisiac…
