Eriko, a married woman living alone with her son after divorcing her husband, finds herself alone with her son's friend who came over to study and stay overnight. While the young man is showering, she becomes captivated by his naked body and can't resist masturbating. Her son's friend accidentally witnesses her act and the next day, faking illness, approaches Eriko with growing desire. Initially resisting, Eriko gradually awakens to her own suppressed lust as she's overwhelmed by the passionate advances of the young men. Succumbing completely, she loses herself in intense pleasure, rolling her eyes back and climaxing again and again.