Drinking an aphrodisiac and being 100 times more sensitive, mother and son seek each other like crazy, intensive creampie sex

Yoichi has always loved his wife Yuko, but Achi hasn't been feeling well lately. Worried that Yuko would lose her affection if things continued like this, Yoichi secretly purchases 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 sting, and Kota, who gets an erection, gradually loses his rationality and seeks violently and ends up in a physical relationship. The two, who are drowned in pleasure, realize that the cause of their mistake was an aphrodisiac...