Newly appointed teacher Yuria Satomi was slowly adjusting to her new life and regaining her sense of self. However, one day, a fellow teacher burdened by debt conspired with students, leading to Yuria being forcibly taken to a basement and raped by four male students. The horrors escalated daily, trapping Yuria in a hopeless nightmare of relentless abuse. She was filmed being sexually assaulted by two female students in a lesbian rape scene, then during class, forced onto the teacher's desk and subjected to a public gangbang—six students taking turns violating her in a degrading toy-filled orgy. Gradually, Yuria's body and mind were completely dominated, until she eventually began craving the primal pleasure of being used as a woman.