At first, He Xianyu just noticed that the pen on the desk was often lost for no apparent reason, and He Xianyu didn't think too much about it. But then the things thrown away became more and more strange: used math scratch paper, finished Coke bottles, wiped sweat tissues... Etc.? A tissue for wiping sweat? ?
Forget it, just when He Xianyu was about to turn a blind eye, the feeling of being watched made him have a strange idea: I might have encountered a ghost.
Perry: ... What? I'm not, I didn't, don't slander me
Intention: Study hard