School principal Manami harbored a secret she could never reveal to anyone: she derived a unique sexual pleasure from scolding students. In her daily routine, she would sternly reprimand noisy students in the classroom, then return to her office to indulge in masturbation. This pattern had become the rhythm of her life. However, one day, her secret was discovered by the very students she disciplined. Now, those who had long endured her harsh punishments would turn the tables, launching a brutal reversal as they gang up to assault and dominate her.