Help me if you can! Please :’)

Hello,I use to read this BL and I only know a bit of it about this guy being like sexually abuse by his lover or roommate I don’t really remember but one day he was at work and met like a vampire and told him that he could grant him anything so the main character told him to kill the lover and the main character start staying with the vampire but the ex lover is still alive by the help of another vampire, I remember that the cover have the main character with like a scarf and wine glass, I think it have vampire in the name but I don’t remember ╥﹏╥