Non-Magic AU: Newt and Credence are centuries old vampires who are actually decent and peaceful, stealing from blood banks or drinking animal blood. They love each other greatly but they've always felt like there was a piece missing. They decide to leave England and head for The Big Apple. It's by chance that they are at a cafe or some other unassuming place when in walks a handsome and sharply dressed man with dark hair. Newt and Credence catch his scent and they are hooked. He's the one they have both been yearning for. They are quite giddy when the man locks eyes with them and confidently comes over and introduces himself as Percival Graves, a New York City Detective or some high powered suit. They have a wonderful conversation that culminates in dinner plans. It's then that the vampires decide to carefully court their intended mate rather than just ravage and take. The three fall deeply in love, but Percival being the detective starts to notice some peculiar things about his lovers. When Credence and Newt finally reveal their truth to Percival, will he accept them or will he run?