Rina is the basketball team's manager—diligent, serious, and strong-willed, with a deep sense of justice. She openly opposes the delinquent players' misconduct, glaring at them with cold disapproval. Enraged by her attitude, the delinquents decide to attack her. They record the assault and, during the school break, imprison her inside the deserted school building. With no one around to save her, they indulge their desires, violating the innocent schoolgirl's body without restraint and reveling in her suffering. A brutal story of pure innocence destroyed through cruel training, uniform humiliation, kidnapping, creampie-filled gangbangs, and merciless domination.