Teacher Chisato is caught in a trap set by delinquents after defending a bullied student. They break into her home, where she suffers assault and relentless sexual torment. Despite her resistance, she involuntarily succumbs to pleasure, her reactions captured on video. Blackmailed with the footage, she becomes the gang's sexual outlet. As her students continue their lewd abuse, her body gives in helplessly, left ravaged by craving and pain.