Asahi, living with her son while her husband is on a long business trip, sympathizes with the complex family environment of her son's classmate, Koume, whom she recently met, and gradually opens her heart... Koume, who was lusting after her seductive body, takes advantage of Asahi's defenselessness and has sex with her without warning. Asahi is tormented by guilt, but forgets herself in the pleasure of her private parts, which she hasn't touched in a long time, and succumbs to the persistent caresses, surrendering her body. As she repeats affairs with her son's classmate, her instincts begin to seek the throbbing of her uterus, eroding her reason...
