Hermione thinks Snape is dead only to stumble upon him in her parents' kitchen. Romance ensues. (Yes, it's become kind of an HG/SS trope, but it was a plot-bunny that wouldn't die.) Rated for a bit of swearing and a bit of smut.

Snape and Dumbledore enact an old tradition in the castle, hoping to gain a much-needed edge. More-or-less AU starting at book 6. Rated for language and smut.

An unexpected attack allows a lonely Hermione Granger to enter into a longed for relationship with Severus Snape. Theirs is a unique relationship which will have unexpected benefits. Will our favorite couple be able to choose the recipient of this benefit, or will a scheming Dumbledore try to steal it from them. Christmas fluff, with a little angst and drama thrown in.

In her sixth year, Dumbledore makes Hermione a key figure in a plan to help Harry defeat Voldemort. (It's difficult to summarize this without spoilers— HG/SS; there's a Time Turner involved but probably not how you expect; the story really gets started in Chapter Three.)