Maiko, living with her son while her husband is on a solo assignment. One day, her son brings his classmate Haruto home... Haruto, who was more aware of Maiko as a woman than as a mother, takes advantage of her kindness and forcibly establishes a physical relationship. Maiko, who is troubled by having a relationship with her son's classmate, even though it was unavoidable. But her body, which has been hungry for pleasure for a long time, is so wet that she can't help it, and she opens her legs seeking a dick...