​Yumi, a stunning and well-endowed teacher, has always aimed to please her students. Unfortunately, her own desires have always eluded her, and lately, misfortune seems to follow her. From a devastating breakup with her fiancé to being sexually harassed by the Vice-Principal, Yumi’s world is falling apart. In a twisted turn of events, she finds herself ensnared in a steamy and relentless orgy with the VP and a group of insatiable students. They pressure her into becoming their secret sex slave, leaving Yumi desperate for an escape. With the hesitant support of Katsutoshi and his spirited girlfriend Keiko, Yumi’s chances at breaking free from the shackles of her sexual enslavement are slim, especially since the allure of the seductive teacher seems irresistible to everyone involved.​