(It took me a while to catch up on my reading, but I'm finally here!)
What a great story; I really enjoy first person POV when it's done well, and it certainly was done well here. And the time and place was so fantastic and magical. I like all kinds of Snarry stories - Snarry is really about their interaction with each other. A writer who can take them and throw them into a different setting other than canon. but still keep them 'Harry' and 'Snape' is definitely a talented writer!