The housewife, Juri, lives with her college-aged son while her husband is on a long business trip. Her recent worry is that her son's room has become a gathering spot for his friends as he nears job-hunting season. One day, as she goes to take a bath as usual, she unexpectedly encounters one of her son's friends masturbating in the tub, both of them naked. From that day on, her previous daily life disappears. She becomes a sexual outlet for her son's friends, gradually losing her rationality. The young men toy with her body, and she wavers between pleasure and guilt.
