A group of ronin students gather at a place known as a dormitory. Rumor has it that anyone who stays here is guaranteed admission to their desired school, and the secret lies with the dorm's manager, Fujiko. She practices a unique method of student management—seemingly eerie at first glance, yet highly effective in improving the residents' academic performance. Her method is extreme: using her beautiful, voluptuous ass as bait, she fits each student with a chastity belt. Those who focus on their studies and show improvement are rewarded with the ultimate pleasure—an exquisite ejaculation as their "reward." Once again today, they sit diligently at their desks, dreaming of both academic success and intense gratification.