Nina, a single mother, has been interested in her son's friend, Yuuki, for some time. When he comes to stay the night, she seduces him while her son isn't looking. Yuuki is in his prime and can't resist his friend's mother, who is plump, fair-skinned, and has a voluptuous K-cup bust... After they start having sex, things gradually escalate!! A sexually frustrated single mother and a sex-crazed student finally start having sex right next to her sleeping son... In this immoral affair, the married woman falls into a swamp of irresistible pleasure...