Aiyu, the flawless beautiful wife who is both considerate and talented, had just one flaw. While her husband was away on a solo assignment, she had developed a physical relationship with her only son. She had thought, when her husband returns, she would end this fruitless relationship. However, her son, just entering puberty, was like a randy monkey, his sexual desires increasing. Aiyu, troubled by her son's advances even with her husband present, found herself increasingly unable to suppress her own bodily urges.