Yu and Shinya are a happy married couple. However, perhaps due to his age, Shinya's erection is weak. Fearing that he will disappoint her, Shinya decides to rely on a powerful aphrodisiac, but Yu and her son Hayato accidentally drink the drink containing the aphrodisiac. The two of them are so deeply and passionately in love that their reason and consciousness are lost in the sudden surge of carnal desire. Their bodies, having experienced overwhelming pleasure, cannot forget the sensation even after they realize that it was the aphrodisiac that caused it...