Help me find this manga

There so manga I'm looking for one is set in the past there's a blonde haired cop seme who starts sleeping with a black haired guy from a gang it's a manga non coloured

The other is a side couple I'm looking for the uke is a badass omega who would beat the shit out of any alpha classmates who tried anything with him then this foreigner (possibly a prince) shows uo and takes him away back to his country they stay there together for a while I because he's fallen in love I have no idea what the main couple was possible the side couple is the parents of one of the mc but I'm not sure