Give me recs on a married or just a couple, but one is secretly hiding something, like they a killer/gangster/mafia, etc.
At the top of my head right now is Red Candy.
https://www.mangago.zone/read-manga/dear_only_you_don_t_know/
Also https://www.mangago.zone/read-manga/spy_x_family/ https://www.mangago.zone/read-manga/a_married_killer/
Give me recs on a married or just a couple, but one is secretly hiding something, like they a killer/gangster/mafia, etc.