There is a medicine in the world - the medicine of no regrets
Luo Yu——the little immortal king who fell into the mortal world in Kunlun Ruins
Chu Huan——The boss of the unnameable group
The fairy who persuades people to believe in science × the righteous and sinister police uncle
The unnameable group - a group that dances on the tip of the rules
For the rest of the character introduction, you can read the preface
Purpose: Solving crimes, humanity, medicine