THE UNRULY IMMORTALS

High schooler Li Huowang can close his eyes and be transported to an uncanny world. Over there, he is a medicine primer who will be made into pills by his "Master" at any given time. Meanwhile, in the real world, Li Huowang is living in a mental hospital, unfit to continue school. The doctor told him that the uncanny world is just his hallucinations. What is real, and what is fake? Li Huowang really does not know. (Source: Webnovel) — Description from AniList community (anilist.co).