Ayane is a beautiful wife who is attentive to her husband and has both intelligence and beauty... but she has only one flaw. While her husband is away on a business trip, she ends up having a sexual relationship with her only son. She thought that she would put an end to this fruitless relationship when her husband returns, but her son, who has just hit puberty, has an increased sexual desire like a monkey in heat. Ayane is at a loss as to what to do when her son comes on to her even though her husband is right in front of her. However, Ayane herself is no longer able to suppress the throbbing in her body...