Yuka, a mother, lives with her son Yohei while her husband is away on a business trip. One day, her son's classmate, Yuki, comes to visit. When Yuki, a bully, finds out that Yohei's mother is a hot woman, he sets a trap to get his hands on her ripe body... Yuka's body, unconsciously frustrated by the lack of sex with her husband, cannot resist Yuki's desires and is reminded of the joy of being violated. Dominated by the young and powerful cock of her son's classmate, the mother falls into a whirlpool of pleasure...