Yumi is a passionate female teacher who gives extra lessons to Nonaka, a student whose grades have dropped, at her home. While her husband is away on a business trip, Nonaka leads some delinquent students into her house. Yumi is shocked by Nonaka's betrayal, and the young beasts rape her mercilessly. Imprisoned in her own home, something inside her is triggered by their insatiable torture! Before she knows it, she has become a lewd female teacher who swings her hips and craves cock...