Any colored manhua/manhwas with semes similar to Painter of The Night's and Sangwoo from K...

http://www.mangago.zone/read-manga/criminal_interview/
maybe this

kinda asshole seme's/ sadists
http://www.mangago.zone/read-manga/if_you_do_not_obey_me/
http://www.mangago.zone/read-manga/hogu_hagyeongsu/?av=2
http://www.mangago.zone/read-manga/royal_servant/?av=1
http://www.mangago.zone/read-manga/obey_me/
http://www.mangago.zone/read-manga/warehouse/
this one is both, black &white but also colored parts
http://www.mangago.zone/read-manga/escape_into_oblivion/
not full color, but if you want to read a real good one...
http://www.mangago.zone/read-manga/color_recipe/

http://www.mangago.zone/read-manga/ghost_child/