Severus Snape wasn't going to miss this potions class if the world was ending. Well, it would mean his hide if either of the two Precious Brats managed to incinerate, explode or otherwise liquefy the other, so it was a good thing the world wasn't ending - Dumbledore would probably insist that Snape stay here to supervise. As in: "If we fix this, we're still going to need those brats, so make sure they don't do something mind-bogglingly stupid."
And so Severus Snape sat, mindlessly grading papers, and heard Harry Potter arriving early. And without Granger, who might have managed a bit of moderating influence. That boded poorly. If only Potter was the type to remember that Snape liked to sit behind the door... listening (It wasn't spying, after all, when it was his own class).
As the door opened, and Granger and Zambini stepped inside (both talking to one another on the proper uses of lacewings), Snape let out a silent sigh. The more witnesses - the more moderation, the less likely that Potter and Malfoy would silently strangle each other without Snape being any the wiser. Not that it was likely in the first place. Blaise Zambini had a delightfully mocking sense of humor, and that would turn favorable here. And Granger, while generally humorless, was skilled at the art of Making Potter Obey. Snape had often thought her too skilled at this legerdemain, but on this one occasion, he was glad of it.
Draco Malfoy sauntered in with less than thirty seconds to spare, and Snape didn't need to see him to know he was smugly grinning. No, Potter's voice took care of that for him, all the rage and fury of a two year old's tantrum compressed into two words, "What gives?" Potter spat at Malfoy (and from the tone, he'd hauled the fineboned boy up by his robes).
[a/n: next chapter is from Draco's perspective. Though it's helpful for the reader to know that Snape, as always, is fretfully outside the door, this'll be way more fun from Draco's view.
Do leave a review.]