Modern young people from different hometowns gather at a certain women’s dormitory. They would like to live at their own pace under the same roof, but that is not how it works in dormitory life. By strictly adhering to wake-up, bedtime, and meal times, their defecation schedules gradually become synchronized, and it is common for them to run into each other in the only shared toilet. When they have time to go to the toilet, they can be kind to each other and give in to each other, but this time it was too impossible. Almost at the same time, they were hit by intense stomach pains and a hot urge to go to the toilet, and the female college students ran in front of the toilet, desperately trying to block their anuses that were about to erupt. Like a spider’s thread hanging in hell, they push and push each other, trying to grab the one toilet bowl first, and screaming in agony. The spider’s thread snaps instantly and everyone falls into hell. The panties after the bath are mercilessly soiled, the panties they only wear to sleep in, and the panties they wear to wear when they go out. The feces of those who had forgotten mercy emitted a foul smell inside each of their panties.