Wheeehehe, it's the first snapelyholidays post of the season, and Snape gets doubly lucky! :D
Classic potions accident sex; yay! Back to basics, eh?
I have a major soft spot for teenage Snape, and you've captured him wonderfully here.
Severus rolled his eyes and looked down at his book, trying to make out the notes he'd just been writing before Lily had entered. If she wanted to play with dogs, then that was none of his business. However, he just couldn't help himself and sneaked a glance at the two of them from out of the corner of his eye. -- Haha, so Snape. This is where I was hooked.
Lily's fabulous too; very bold and all Gryffindor.
The ending makes it so bittersweet. But since this is AU, I can imagine that Severus and Remus got together again once Remus arrived at Hogwarts, yes? ;)