On the surface, she lives a peaceful school life as a voluptuous J-cup girl named An Natsu, but in reality, she has a timid personality and can't refuse requests from others. Taking advantage of this, the homeroom teacher, gym teacher, classmates, and even the janitor... everyone has their eyes on An Natsu's ass. Her big ass's anus, targeted by perverts from all directions, is developed and trained in various places within the school, opening wide. And so, it becomes a shared hole for everyone to relieve their sexual desires. #YōrōP