To save her brother who attends an all-boys school from bullying, Mahiro, his sister, disguised herself as a boy and infiltrated the school, managing to stop the bullies by exploiting their weaknesses. However, when the bullies found out that Mahiro was a girl, she was subjected to a retaliatory assault. Initially strong-willed, Mahiro gradually succumbed to the pleasure of being abused, drowning in lust and losing control...
