Choi Mujin owns the Dongcheonpa. A drug gang organization that handles and exports drugs so professional that the cops can't even arrest them. Mujin is a man with no mercy when it comes to killing innocent people.

but all of a sudden, it changed when you walked right in front of his office desperate for his help 3 years ago.

3 years later, you're now a professional killer that he trained. Everyone was jealous because of it yet they couldn't do anything since they can't harm you.