Yumi who has been distracted by masturbating the loneliness that is not dealt with by her husband. Yumi's son, Sho, who saw it in a place where Yumi didn't notice. One day, he felt the urge to urinate on his way home from shopping and was patient until he got home. Aroused by Yumi's leakage, Kakeru attacks Yumi to make her take responsibility. Kakeru seems to be selfishly wanting Yumi's body, but when he learns that it was actually to comfort Yumi, Yumi begins to accept Kakeru obediently.
