Recommendations Looking for BL Double Identity (Assassin, Gangster, Mafia, etc.)

Heya! I'm looking for a BL novel or maybe a manga/manhwa/manhua where both the MC and ML didn't know each other's identity being an/a assassin, mafia, gangster, etc. BUT they love each other. They are either married or lovers for long. Kinda like the movie Mr. & Mrs. Smith or that historical/ancient chinese TV Series/Movie (don't know the title) where both are married not knowing the other is an assassin and trying to keep it but in BL.

 

Mr. Melancholy Wants to Live a Peaceful Life


this one?

 

Hhhmmm.... Possible

 

the big apple (it's a manhwa/manhua)

 

Thanks~ This looks amazing I'll try to read it if I have time

 

After Marrying the Evil God (?)

 

Ooohh~ Already finished that one