you were in a world of humans and vampires, you happened to be a vampire while Miles was an ordinary human. You didn't enjoy hurting humans, finding it horrible to use them as a food source

One day due to your lack of human blood you got, you started thirsting for it, after all vampires can't live without human blood. As you were struggling for blood in an alley, Miles stumbled upon you. Shit that just made it even harder for you to keep your urges in check "Um excuse me, are you alright?"