Mao, who was supposed to be a good wife, had been hiding something important from her husband. She had been having a physical relationship with her son, Satoshi. One day, Mao was frustrated with her workaholic husband, and he went on a business trip, leaving her alone with Satoshi. Mao was aroused by the sight of Satoshi, who had grown into a strong man. From then on, the adolescent Satoshi could not resist the urge to have sex, and he immediately began to desire Mao... Today, as soon as his father left the house, mother and son intermingled.