Students have a very tight lunch schedule. This work focuses on the excretion situation of girls during lunch break. Some girls rush to the toilet after lunch because they need to defecate, and some girls hold their poop in while having girl talk, and then rush to the toilet at the last minute of lunch break and release a large amount of poop while panting. Many girls were seen with poop right up to their anus during lunch break. They don’t want anyone to know that they are pooping in the school toilet that their classmates use. When they are called out to from the hallway, they pretend not to know, but they return to the classroom, very worried about the smell of their poop.