Brian comes to NYC
What I remember about this fic is that Brian decides on a whim to come live with Justin in New York. I think he doesn't even take anything with him. But once he gets there, he feels out of place and old (they go out to a club, Justin thinks he has to trick to not make Brian feel uncomfortable, while Brian - I think - gets rejected by a guy). They go home to have sex (I think Justin's school uniform makes an appearance...).
As far as I can remember, it's the sequel to another story and I'm pretty sure that this was where the story ended back when I read it. I have no idea if it ever got finished... and I'd really like to find out. Any help is appreciated!
ETA: Found! Thanks to
gmta_nz!
It's
bloodyrose82's Into the Ether, sequel to After the End. Unfortunately, it really is unfinished.

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She only posted five parts, unfortunately. You can find them in her LJ Memories. Here's the first:
http://bloodyrose82.livejournal.com/65714.html
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...and damn, that's really where it ends. I was hoping it would be finished.
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