When Wanderer first enters, she is in a very small space with no sound. The legs, feet, and arms cannot be straightened, and the surrounding environment can be described as "like being inside an egg." After trying to escape from the restraints, she discovered that there were many similar structures around him: they were not eggs, but cocoons. The number of cocoons is too large to be estimated. They are all placed in a deep pit. When Wanderer looks up, she can see the circular sky. It was nighttime and stars can be seen.

Open any cocoon, and there is a person sleeping inside. Wanderer thinks they are all students. And this pit is the school.