The husband who made a woman outside never comes back. Reiko was trying to raise her son Ryota alone and fulfill her parental duties. However, every day when I just comforted myself with masturbation in the shadows was lonely and painful. Ryota, who was heartbroken by the appearance of Reiko, decides to embrace Reiko. If that makes my mother's loneliness disappear, I don't mind a forbidden relationship. Reiko, who felt her son's will firsthand, accepted. I want to comfort Reiko. With that single-mindedness, Ryota pours sperm to the limit of his physical strength.