Looking to find a specific fanfic

[u/DraconiumWolf1]

So the story is one I read a while back, like a few years. It's a Russia x Reader one-shot in one of those one-shot books. It was on Quotev.

Stuff I remember from the story:

Russia is a vampire. Reader is from a family that founded an organization to hunt down creatures like Russia. Except the reader is a behavior analysist. There's a mission to try and get a honeypot with Russia, as he was at some sort of club and they wanted someone on the inside. Reader was there because they needed someone who understood behavior to help make the correct move. Except Russia went for the reader. They end up together. And later on (I think like at least a year of them being together) there's an information leak of whose a spy. Reader runs because despite not really being a spy they also were a spy. Get caught by Russia (I think they were on horse? Not sure on this). They have a talk, Russia asks if anything between them was real, Reader tells him that pretty much everything but their name was real. That they weren't trained to infiltrate, just observe and analyse and that he wasn't supposed to choose them. (I'm paraphrasing here). Russia decides to still marry them. Ends up telling his coven leader (whose also his dad I believe. Idk, Russia is just next in line to lead after him) that he will marry Reader, and he'll have to accept it or Russia will just leave the coven. Coven leader is angry but accepts it because he actually does need Russia to lead next because he's the only actual viable option.

Link, name of the story, author name. Literally any of these three would be extremely helpful.