Maiko lives with her son while her husband is away on a business trip. One day, her son brings home his classmate Haruto... Haruto, who sees Maiko as more of a woman than a mother, takes advantage of her kindness and forces a physical relationship with her. Even though it was unavoidable, Maiko is troubled by the fact that she had a relationship with her son's classmate. However, her body, which has been starved of pleasure for a long time, becomes hopelessly wet and she opens her legs for a cock...