When Tomomi, a mother, made coffee for her son Masato, a college student, she noticed that instead of studying, he was masturbating while looking at pornographic magazines. Disappointed and angry, the mother made her son masturbate in front of her to encourage him to reflect on his actions, but the nervous son was unable to ejaculate, so Tomomi ended up masturbating him with her hand, but the son got a taste for it...