Akira, the son of Mitsue, has an uncontrollable sex drive and is always masturbating. His room is littered with AVs and onaholes, and he indulges in self-pleasure whenever he has free time. Seeing her son like this, Mitsue cries outside his room and remembers Kana, who also has a strong sex drive. To deal with the troubles of her son, the sex monster, Kana is consulted: "If you have such an intense sex drive..." Thus, Kana decides to confront the sex monster Akira.
