Looking for a manga/hwa

Hey I’m looking for this GL manhwa I read a longgg time ago!! So basically it’s somewhat short and it’s about an assassin who falls in love with this sort or prostitute(?) but the prostitute is like sleeping with this guy who works with drugs and is rich. The assassin is like infatuated with her and I think she is ordered to kill the rich guy and meanwhile the rich guys like manipulates the prostitute to go and sell the drugs or else something bad will happen to her. It’s sort of like a tragedy but the ending was I think bittersweet.