Drama where the ML is part of the mafia or just "bad"

I recently watched My Name on Netflix and I really liked Jiwoo and Mujin’s dynamic because of how twisted it is, so I’m looking for MLs like Choi Mujin, but with the romance aspect that this drama didn’t have (for obvious reasons).

If you haven’t seen My Name, I’m just looking for a ML who’s a bad person (or considered a bad person). He can be part of the mafia, a killer or just do bad things in general. Romance is a must too, I don’t care if it has a happy ending or not tho. Thanks!