Soul Resurrection: Choose Nightmare Difficulty at the Start

Xiao Xiao was reborn in a parallel world where his soul was revived. After graduating from high school, he became a university teacher. On the one hand, he has to face the problem of how to teach students, and on the other hand, he has to deal with the dean who wants to fire him at any time. What kind of dark shadow is wandering around in Classroom 1901 at midnight? What makes the owner of hand cakes at the school gate stay up all night writing? Why can't the black shadow in the parking lot come out? Are the sleepless streets outside the suburbs as glamorous as he made them out to be? Also, who is trying to murder Xiao Xiao, an innocent middle school boy like him? ... The world is going crazy... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.