Ms. Mina, who is popular with both students and teachers for her bright, cheerful personality and beauty, is also very serious, but she has succeeded in developing a slightly unusual study method. The method is to make adolescent male students release the sperm that has accumulated in their testicles so that they can concentrate on their studies. Moreover, the most effective way to thoroughly empty their testicles is to have them ejaculate repeatedly. To test the effectiveness of this method, she uses her overly lewd, huge-breasted and big-assed body as a test subject, enthusiastically milking them with sperm!