Six months after her father, who made a woman outside the home, left. Yuusuke was heartbroken by the sight of his mother, Miyako, who was forcing herself to act cheerfully so as not to worry him. Wondering how to cheer up his mother... Yuusuke, who was troubled, decides when he sees Miyako sobbing while masturbating. I will be my father's substitute. Yuusuke embraces and caresses Miyako as one man. Miyako is confused, but when she realizes that Yuusuke is serious, she loosens her resistance.