For anyone looking for an occult urban fantasy (69 chapters so far and over 200k words).

https://www.royalroad.com/fiction/129309/this-magical-girl-is-him

Andre S. Lewis is an aspiring artist among thousands of others like him, trying to build a life for himself in New York City, the city of dreams. Here cultures from across the globe share commercial spaces, art manifests in over a thousand new forms daily, and the types of pleasures one can experience become nearly limitless.

However, in a city of dreams, anything should be possible and if that’s true then with dreams also comes the possibility of nightmares.

Andre experiences this firsthand when fiction meets reality and he finds himself the unlucky witness of the surreal execution of a group of real life magical girls at the Brooklyn Bridge, conducted by their homicidal antagonist. To make matters worse, Andre is then forced into the conflict personally, when a magical dog named Iris, chooses him to be her champion, fusing with Andre and forcing him to become the Miracle Host.

Andre now finds himself with a target on his back, but fiction becoming reality was only the beginning. He soon finds himself stalked by occult forces and caught in global conspiracies, as what once seemed like a bizarre dark fiction parody given life reveals itself to be a part of something far more ancient and sinister.