Megumi, the wife, was hospitalized due to hemorrhoids, leaving Susumu to live alone in discomfort. Suddenly, his stepmother Yuko appeared at his doorstep. She efficiently cleaned the house and announced she would come every day until Megumi was discharged. Susumu's heart raced at the thought of this new life with his stepmother, his groin growing hot. That night, overwhelmed by loneliness in Megumi's absence, Susumu began masturbating—never imagining Yuko would catch him in the act. How their relationship will unfold from here will only deepen the story to come.