Mitsuki, a popular and cute student at a prestigious girls' school, becomes the target of bullying by her classmates and teachers after a certain incident. It starts with being forced to make silly faces for photos, then escalates to slapping and having buckets thrown at her while not wearing underwear. She is subjected to increasingly severe abuse—her body is defaced with graffiti, she is spat on and urinated on, and ultimately forced to masturbate in front of the entire class, enduring extreme humiliation. As these horrors continue day after day, Mitsuki gradually breaks down mentally.