Wu Ze used to believe in science, until the day he turned twenty-one, when a doctor handed him a certificate diagnosing him with mental illness.
He looked at the doctor before him, who was like a berserker, the moon outside the window covered in eyeballs, and the human-shaped insects passing through the hallway. Then he started figuring out how to run off with the little loli patient next door.
Volume One: Demons Run Amok in Canghai City. My Youth Story Can't Possibly Be This Bizarre.
Note: There are no Japanese high school girls like the ones you're thinking of (runs away).
Set in a fictional world. You may come across many familiar things.
