PLEASEEEEEEE MAMA IM IN LOVE W A CRIMINAL

https://www.mangago.me/read-manga/when_the_killer_falls_in_love/

I actually haven't read it but it's probably related to wht u want...obviously

Honestly, Passion. And the second couple of love so pure

https://www.mangago.me/read-manga/kansai_jin_to_hukuman_satsujinki/
Deadass this is the manga lol

Mafia:
Roses and Champagne
https://www.mangago.me/read-manga/mad_dog/

Killer:
Kansai Jin to Hukumen Satsujinki

Killer but not as a huge plot point:
Dear Teddy Bear
Koisuru Psycho no Shirayuki-kun

I appreciate y'all... But I've read all of these THANK YOU FOR RECOMMENDING, THESE ARE GOOD MANHWA)MANGAS