Takahiro, who became a college student, lost his father and lived a life unfamiliar with his mother-in-law, Mai. Mai, who wants to be called a mother by such a son, tries to shorten the distance, but Takahiro has a lover, Eriko, who is a year away. Coincidentally, Eriko was Takahiro's mother ... Mai, who was jealous of Eriko, abducted Eriko because of her affection, and Takahiro also ...