Momoko (Kamino), who broke up with her husband to be with her mistress, accepts her mistress Terada's cock at her first meeting after being single. However, he is at a loss for words when Terada tells him that everything up until now was just a game. The next day, a heartbroken Momoko returns home and sees Hideo, her son's best friend, lying on the sofa in her own underwear. And out of loneliness, she makes a mistake with Hideo... but that mistake leads Momoko to a strange love triangle.
