On his first day at his new school, a new teacher, Niimura, witnesses students bullying each other in the bathroom. - He immediately reports this matter, but the principal just cuts him off... Niimura, who is unsatisfied with the school's secretive nature, has a hot-blooded sense of justice and confronts the bullying problem with his girlfriend. - They deal with the accumulated stress and semen of the students who were the perpetrators, and use their own anuses and pussies as teaching materials to carefully teach them how the anus works and the difference between the two holes. - Meanwhile, a class begins in which the student who was being bullied and the student who was being bullied work together to demonstrate double-hole sex...