The kind sister 'Yume,' who dotes on her younger brother, one day learns that he is being bullied at school. In an effort to save him, she disguises herself as a boy and infiltrates the all-boys school he attends. She tries to stop the bullying by holding the ringleader's weakness over his head but ends up revealing her biggest secret instead: Yume is a girl. Immediately, she becomes prey to savage men, and days of nightmarish gang rape begin.
