Multiple Space Timelines

Multiple perspectives, several protagonists, different experiences on the same day, who am I? It's Liu Yu who repeats the day before every day Or Zhang Bei who does everything easily Or the burly but extremely flexible Guan Fei Or Zhang Xin, who has nothing to do with all this but is inextricably linked to it? What happened to the school? Is it still the same school after school? The dual world is still my illusion, what is everything... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.