Su Mu is just an ordinary high school female student with an ordinary life and a lot of bad friends around her. She liked reading novels when she was in junior high school. She always dreamed about something special happening in high school, going crazy in her youth, thinking about having a strange love story in high school or becoming the savior to save the world one day. There are indeed strange things happening around Su Mu. As soon as she falls asleep, she will wake up at the door of her dormitory wearing her school uniform and cannot fall back to sleep. At night, the campus was covered by the second world and turned into a brand new space. There were boys who seemed familiar, there were space barriers, there were different doors, and there were stone tablets engraved with strange words, all of which foreshadowed something. This is such a story about campus during the day and adventure at night.