I'm Interning in a Lunatic Asylum

Meng Fan came to a lunatic asylum as an intern after graduating from college. But since arriving here, he has found strange things happening around him. The little nurse who disappeared inexplicably. A strange figure in the corner of the toilet. Strange symbols appear on the dormitory walls. Not only that, the patients here think and behave very strangely. Mysterious multiple personalities, hallucinations, special hobbies, recurring dreams... What secrets are hidden in all of this?