This was very well written, but it wasn't your typical romance, I'm not even sure if it qualifies as a romance. Damon is a male prostitute, and an incubus. One of his clients is dying, and tells him that if he brings him the real story of one of his johns, he will make him his heir, and leave him all his money.
So the love story really isn't about the MC at all, but about two people Damon knows, a fellow prostitute, and one of his clients, who have fallen in love.
I thought the incubus bit didn't really add anything to the story, it was really almost an afterthought. He was a hooker, who just happened to be an incubus.