Tomoya's mother, Kiyono, has been an object of admiration for Atsushi, a homeless boy, since he was a child. As their houses are in the same neighborhood, the families are friendly with each other. Atsushi accidentally sees his father, Kenta, kissing Kiyono. At Tomoya's invitation, he goes to the Kanzaki house as usual, but he feels awkward in front of Kiyono... Meanwhile, Tomoya is late for an appointment and heads to the Kanzaki house alone... He calls out to her but gets no response, and when he goes inside, he sees Kiyono masturbating. Having seen Kiyono in her womanly state, Atsushi can't help but pounce on her. Unable to contain his desire, Atsushi uses every trick in the book to harass Kiyono, and Kiyono gradually becomes captivated by his desire...