She goes to the line

Mai didn't think she could stand another flight of stairs, so she decided to go to the back of the line and wait her turn like everyone else.

Standing was not comfortable for Mai, and the incessant cramps weren't helping her endure.

She was squirming, jumping, rubbing her stomach, but nothing was enough to relieve the pain.

About five minutes passed, and the line barely advanced a couple of times. Mai was wondering if she should have gone to the upstairs bathroom. But it was too late to go to the third floor. The first flight of stairs had whipped her intestines a lot, and she knew that trying again would only end with her filling her panties with shit.

Another five minutes passed, and Mai couldn't take it anymore. She had been holding on too long, and her tired anus couldn't handle the pressure anymore.

But the straw that broke the camel's back was a thunderous, wet fart. That fart caused Mai's poop to come out quickly, and Mai couldn't do anything to stop it.

The girls who were near Mai in line gasped and walked away from her as her poop overflowed their panties and she fell to the ground with a splash.

Mai could only cry and cover her face. She was very embarrassed by the accident that had just happened.