The new teacher "Nishida" came to a depopulated school with only one class. And this school has a principal who plots to let him go to college through the back entrance. Nishida, who has a stronger sense of justice than anyone else, is in conflict with the principal, saying that he will let him go to school on his own without relying on such a back door. First of all, Nishida proceeded with the lesson with his anus as the subject matter to make his students know the importance of learning. He carefully teaches the mechanism of anal and rewards those who improve their grades. When he succeeded in reconciling with the principal and expanding his anal, he told him that he would not give up on anything with the most difficult public two-hole SEX.
