Nana, a new teacher at an all-boys school, is a timid and socially awkward girl who was severely bullied in the past. Inspired by the homeroom teacher who protected her then, she decided to become a teacher herself. She tries to protect Yamada, a soccer club member who is being bullied and physically punished, but ends up being imprisoned in the clubroom. To protect Yamada, she becomes the delinquents' sex toy and is ravaged mercilessly. She endures humiliating masturbation shows, gangbangs, and intense creampie sessions, her personality shattered by the relentless abuse. Even Yamada ends up raping her, and Nana's spirit crumbles.
