This story was not a new story. It wasn't something that I hadn't ever heard, and it wasn't told in a particularly unique fashion.
That being said, man, did I enjoy myself. Sometimes, a familiar story can be made engaging and a new experience if written well, and this is a perfect example of that concept. Part of this is solidly on the narrator, who was a goddamn star. His little off-the-side comments, the switch between Andy and Andi, everything that came together for me. So many little lines just resonated with me. I wish I had been a position to write them down to let the author know what exactly stuck, because there were too many for me to remember and post. It was just a solid piece of writing. I do agree, the hunting went on a little long, but the descriptions were great, so I didn't mind too terribly. The ending was quite good as well.
I hate to make another movie reference, since it shows I watch way too many, but this reminded me a lot of "Thirst," a South Korean film directed by Park Chan Woo. (Just as a warning for people who want to watch it, it is slooooooooooow.) However, it has a similar desperate sadness to it, and it's also about a sad vampire man.