Maiko lives with her mother and son while her husband is away working alone. One day, her son brings his classmate Haruto home... Haruto, who was more aware of Maiko as a woman than her mother, took advantage of her kindness and forcibly entered into a physical relationship with her. Maiko is worried about having had an affair with her son's classmate, even though it was something beyond her control. However, her body, which had been starving for pleasure for a long time, became hopelessly wet, and she began to cum on her own.