Her son's friends come to stay and study. One of them witnesses Reiko masturbating and rapes her, seeking her voluptuous, mature body. Another friend, who was secretly watching, joins in and plays with her with a vibrator, making her cum over and over again. Reiko's forgotten desire as a woman is awakened, and she becomes completely consumed by the creampie orgy she has with the young men, feeling guilty towards her son.