Demon in the World

Are you sure that the people around you must be human beings? In a math class, Du Fengyu suddenly discovered that one of his classmates had cat ears on his head that were not human. After that, he discovered characteristics that were not human in many people. After a night of suicide, on his way home, he saw a man turn into a cat and jump into the lake. In order to find out what happened, he also jumped in. A corner of the world is being revealed to him... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.