A vampire-mortal boys love story

The story is set in New Onyx. Ages ago, a human is offered to turn into a vampire to escape from his family and arranged marriage with a girl while he loves boys. In Paris he was turned into a vampire in midnight. Years later, he is now working along with his other vampire brothers as contract killing people, abolishing the wrong people who get away from justice. They kill these criminals to provide justice. One such day while he was killing someone in the back of the bar, a mortal opened the bar door taking out trash. The mortal didn't see them but the vampire doesn't want any witness. So when he went to kill him, he saw how beautiful he is and fell in love with mortal immediately. Slowly by following him and stalking him the vampire came to know, that the mortals parents are dead, he has no one and he works as a waiter in his uncle's bar and sleeps in a house that isn't even worth calling a house. But basically a hard cold floor with a roof. He often takes showers at his uncle's house without his uncle knowing with the help of his aunt. The vampire is so determined to provide a good life for this mortal so few days he go to bar and give him a 100$ tip. Later they talk with each other and one day the mortal is beaten up by a group of drug dealers for nothing as they tried to steal from him.

The vampire saves the mortal from them and takes him to his house giving him that warmth and comfort. And slowly the mortal tries to open up with the vampire. And they make love.

I don't remember the character names, or story name. Help me