Author's note: Okay, I'll be honest, I have never watched Teen Wolf and really don't know anything about it, so my apologies if my story has inaccuracies and sucks because of them. However, I discovered this whole 'sterek' thing on youtube and just could not help myself, I wanted to write, so wah-lah, here it is. Please be gentle and don't tear me up :(

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"Dude, can't you at least knock before you creep in my window?!" Stiles demanded, still trying to shake off the fright he'd felt when he suddenly turned around to find a brooding werewolf in his room.

Derek ignored his words, pushing Stiles up against the wall, "Where is Scott?"

"Like I freaking know? There's a such thing as cellphones these days, try using them for once instead of just coming here whenever you want!" Stiles snapped back, knowing that despite how dangerous Derek was (and the fact that he knew how dangerous the werewolf was), he couldn't back down.

Derek resisted his secret urge to smirk; this sort of attitude was the kind of thing that used to annoy the fuck out of him, but it always just seemed so natural when Stiles did it, and Derek admitted (if only to himself) that it was a little impressive that this sarcastic human would act in such a way, especially towards a werewolf- a werewolf that the boy had admitted to being afraid of at that. "I really will rip out your throat with my teeth."

Stiles shuddered at the thought, knowing that Derek was capable of that and much worse. Yet still, he just couldn't help himself, "I can't even count how many times I've heard that threat, it doesn't take long to figure out its just a bluff."
It didn't take long for Derek to act. The instant Stiles made an unsure jut of his chin as if to prove his point, and Derek had him at the throat. Not his wolf bite, no Derek wouldn't really hurt Stiles in that way, but his human teeth had a firm hold on Stiles' skin. Derek growled low in his throat, biting down hard enough to leave a bruise.
"Owww..." Derek was surprised to feel Stiles' fingers twine into his hair and tug lightly, but what flat out shocked him was the sound of Stiles' voice. It wasn't a cry or scream, it was a whine. A soft little whine that his wolf knew meant submission. "Derek..." Man, he'd never heard Stiles voice like that. He liked it that way. Damn it. "Oww, Derek..."
Impulse control had never been an issue for Derek before, but then again, no one had ever pushed his buttons the way that Stiles had always managed to. Derek licked over the bruises he'd made on that impulse. "Wha-what are you doing?" the werewolf felt the human shiver against his body as he licked at the other boy's neck.

"Just shut up." Derek gruffed, pissed off that somehow he had become twisted enough that he actually felt something towards Stiles in that way. Really? Why the sarcastic human?

"Derek?"

"Seriously, shut up." Look at that mark, it was something that would last, Derek smiled inside at that thought and then had to curse himself.

"This is totally not normal, you know, it's pretty hard to just stand here quietly right after you actually bit me! I-"

"I'm going to bite you again if you don't shut your mouth." Hell, Derek thought, he might bite him again just to hear Stiles make that whine of submission.

Stiles pursed his lips and watched Derek as the werewolf glanced up from his now bruised neck to stare him in the eyes. "That really hurt..."

"Good." Derek said with a hint of a smirk on his lips.

"You can't just bite me when y-" Derek claimed Stiles' lips this time, kissing the human boy with the aggression that came natural to him. What better way to shut the other boy up anyway?
Stiles was surprised by the kiss, and yet he responded in an instant. Damn it. Derek really liked having this pain in the ass human respond to him. Stiles' fingers were still gripped in Derek's hair and were now holding the werewolf in place as they kissed, tongues battling.
Derek felt his inner wolf get excited and knew that this was getting really dangerous. He pulled away, putting his hand to Stiles' chest to keep the boy at an arm's length.
"Well that was...unexpected...why did y-" Derek growled low in his throat, cutting off the human. Yeah, he really shouldn't have kissed Stiles, his wolf was pacing inside, demanding more, demanding everything; this was bad. "First you bite me, and now you're growling at me, sometimes it really does feel like I'm talking to an animal-" Derek hardly kept himself from roaring in frustration, making his way out the window at lightning speed.
"Derek!? What the hell?!" Yeah 'what the hell', Derek mused, he should be asking himself that.

The end!