ASKING AGAIIIIINNN!!

so i read this webtoon about 10 years ago, it’s a bit of a weird one but i was like 9 when i read it, it was on the webtoon app itself and it was about this vampire who had bought a slave, it was a bl story i believe. this slave he bought was related to him in some sense but i don’t remember (i don’t think they ended up together.) the story was in primarily black and white but had some red elements please help T-T. i wanna know if i imagined this whole story or if it actually exists. and also, the slaves couldn’t like leave their homes without their ‘master’ i guess with them. i know the main character wore a bunch of striped shirts but idk anymore. it was gothic though. IDK PLEASE HELP MANHWA ENJOYERS PLEASE!! it’s not blood bank, blood link, or my kings maker :(( the main character has short black hair and the one who bought him had long black hair. i’m going crazy. starting to think it was a figment of my imagination.