A lewd dorm mother's huge ass ejaculation control

There are student dormitories that are rumored to be able to pass the school of your choice if you move in. Fujiko, who acts as the manager of this seemingly ordinary student dormitory, uses a secret student management method to concentrate on her studies. The content was radical, with beautiful, large butts baiting them as chastity belts on the crotch of the dorm students, and only those who focused on their studies and improved their grades were given a "reward" for ejaculation. Today, students continue to go to their desks, dreaming of passing and ultimate ejaculation...