One Fatal Rule

The protagonist Yan Yu was involved in a mysterious space during his walk, which was scary and full of rules. Here, he met the same people who were involved, a total of 4 people, namely, Xiang Wu, a sports zodiac from a certain college, Tang Tan, a working girl, and Lu Yanyan, a girl from an undergraduate college. They can only rely on each other. Can they escape from this scary and exciting space in the end? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.