Help me find thisss

Guysss, help
I was reading a yaoi manhwa some time ago and forgot to bookmark it, and now I can't remember its name, but the main character has pink hair, his sister got involved with this guy who was actually married to a woman involved in the mafia, I think, so they are after them, so they keep the pink haired guy held as hostage to try to find out information about his sister's whereabouts. He then ends up involved sexually with one of the mafia's bosses, a guy with black hair, and he also likes the black haired dude's brother, who has brown hair. I can't remember any of the names. Also it's comedy. Please help meee