Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/702327.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Teen_Wolf_(TV)
  Relationship:
      Derek_Hale/Stiles_Stilinski
  Character:
      Derek_Hale, Stiles_Stilinski, Scott_McCall_(Teen_Wolf), Isaac_Lahey,
      Ethan_(Teen_Wolf), Aiden_(Teen_Wolf), Peter_Hale
  Additional Tags:
      Demon!Stiles, Demonic_Possession, Dark_Magic, Alternate_Universe_-_Dark,
      The_Author_Regrets_Everything, No_I_dont, There_will_be_a_lot_of_sexual
      shit_going_down, This_demon_is_ruthless, Slight_torture...., more_or
      less...
  Stats:
      Published: 2013-02-27 Chapters: 1/? Words: 2181
****** If You Kill Me, You Kill Him ******
by SexySourAlpha
Summary
     “I will tear you apart” Derek growled.
     “Remember Derek? If you kill me, you kill him.”
     “So what are you going to do kill me?” Derek asked, his voice was
     wrecked and he couldn't stop staring into the eyes of the demon.
     Longing for the honey amber irises he had grown attached to, wanting
     back the glow in Stiles’ smile.
     “Oh no Derr Bear. I kill you, I can’t get what I want...so what do
     you suggest we do, Wolfie?”
Notes
     Saw_this_artwork_on_Tumblr_and_got_really_inspired.
See the end of the work for more notes
The room was so dark Derek couldn't see a thing in front of him.
Not that it would have mattered; his arms were bound at the wrist and shoulders
at an uncomfortable position.
His legs were tied to something; a chair, a stool...and by the texture of the
material under his fingers he could tell it was wooden. The ropes holding him
had clearly been soaked in a wolfsbane formula if the searing burning pain on
his wrists, midarm and ankles meant anything.

Regardless of the restraints he should have been able to tear himself from them
without too much struggling. But it wasn't just the ropes binding him to the
stool; there was a force in the space surrounding him.
A supernatural force holding his wolf down, repressing his animal instinct

“Where am I?!?” he shouted, it wasn't so much to draw a response, as it was to
see how large or small of a space he was in by using his voice. The sound of
his voice hadn't reverberated around him so he was definitely in a small space
with solid walls.

There was a bar that made for a foot rest close to the bottom of the stool
where he could feel he was barefoot against the soft stretch of wood. The stool
was surprisingly high, so high his feet couldn’t touch the floor.

He closed his eyes, in spite of the thick darkness, and tried to recall the
last few hours.

He had been scoping out the area where Scott had said he last saw the two alpha
twins. So far they had managed to scare off the two alpha women of the alpha
pack and Peter had effectively killed Deucalion on his own. This left the
twins, who arrogantly thought they could take on Derek’s pack themselves.

So far it had been a vicious game of cat and mouse. The twins were without a
doubt the mostlethal part of what had been the alpha pack.
Their special ability to work in perfect unison when fighting against an enemy
together had proven efficient enough to kill Erica and Jackson, critically
injure Boyd and send Scott off to make sure they hadn't gone after Allison like
they implied.

But it didn't end there.
When separated the twins were extremely fast, feral beast in the woods moving
from one place to the other effortlessly in the blink of an eye. Derek had
found himself tricked into one of Ethans ‘now you see me...now you don't’, but
guess what? I’m behind you’ tricks once or twice.
Them being incredibly strong alphas individually didn't help either. And they
didn't stay separated for too long . Derek had admittedly underestimated them.

And now they had him in their grasp.

He just hoped that once they killed him they would leave everyone else alone.
Let Scott live his life as humanely possible, allow him to put this
supernatural shit behind him, he had never asked for this. If Boyd lived
through his injuries he wanted Boyd to live his life with his head held higher,
the way he holds it now.
Isaac...Isaac would need to move on from him, Derek had taken him out of an
awful situation and showed him compassion he himself wasn't even sure he was
capable of. But when he saw Isaac he saw himself and he didn't want to see the
young man grow up to be like him, or worse...become like his father.
 And Stiles....
Stiles...would have to move on as well. As stubborn as he is he wouldn't...he’d
more than likely swear revenge against the twins. Wrack his brain and tear
through pages of his magic books to find something, anything that could reverse
the situation. Change the situation. Because he was Stiles, and Stiles fixes
everything.
 Stiles loves him...Stiles loves Derek...

D-Derek...I think I’m in love with you....

Derek was torn from his somber thoughts when he heard a loud metallic clang,
almost like the sound of a vault door being unlocked. The noise was followed by
the screeching sound of worn and rusted metals chafing against itself. When the
door was opened the thud of footsteps obnoxiously filled the room.
There was the click of a switch being hit and Derek had to shut his eyes
quickly to escape the sudden blinding light that relinquished the darkness he
had grown accustomed to.

“Derek?” a voice said, a familiar voice...Stiles’ voice.

“St-Stiles? What the hell are you doing here!? You have to leave now!” he
shouted slowly opening his eyes as they adjusted to the light.

“What do you mean Derek? I’m here to save you you idiot!” Stiles laughed

Derek, sighed heavily before nodding quickly “Fine, hurry up and untie me, we
have to leave before the twins get ba-”

He stopped and scented the air around him.

Stiles held out the flats of his hand “Before what?”

Derek scented the air again something wasn't right. Stiles wasn't right.

“Derek what the hell are you sniffing for? I doubt the twins are anywhere
nearby and I-”

“Why do you smell like that?” Derek asked narrowing his eyes at Stiles. He also
took the moment to look over Stiles choice clothing. He was wearing the teal
sweater with the thick lone pink stripe running across the midsection that
Derek had gotten him for Valentines Day over a plain black t-shirt.
His jeans were tight on him though, tighter than normal. Fitting around his
legs and thighs just right, accentuating his assets. And his shoes were just
plain fucking weird. They were oxblood red boots that came up to his shin. The
laces were black and they laced all the way up the boot. In the front there was
a strap that really didn't serve a purpose, mostly just a fashion statement.

There were three things wrong with this.

1. Stiles does not fucking own any plain t-shirts. Every single last one of
them have some stupid saying on the front or a goofy inappropriate design.
Sometimes both.

2. Stiles only own five pairs of pants. The ones he has on now are not one of
them. They smell brand new, fresh off the shelf of some expensive clothing
store.

3. Stiles would never in his fucking life wear any shoe that even closely
resemble the ones he’s wearing now.

Derek felt his heart stop when he recalled the awkward scent.
 
Sulfur.
 
“No...” He choked; looking at Stiles with wide eyes
“NO! Get out of him! Now! Argghhh” he growled, using everything in him to try
and free himself from the ropes. They didn't give.

The conclusion he had come to must have been correct because Stiles...or the
fucking demon in Stiles’ body starts chuckling as it steps closer to him. “What
gave me away?” it asked cocking its head babyishly “Shit! I wanted to see how
long I could swindle you for!”

Derek looked up from under his lashes and glared at the demons pseudo-sad
face...Stiles’ face,
“Get. the. fuck. out of him. Or I swear to god I’ll-”

Something in him tore when Stiles blinked and his eyes went from an oddly
darker brown than his usual amber color to being completely black pools of
darkness.

“Or you’ll do what? Rip my throat out? Hm? Tear me apart?” it growled mockingly
before Stiles’ face became very grim, his jaw clenching “If you haven't noticed
I’m wearing your little fucktoy. You can't hurt me without hurting him.”

The look on its face was untamed.
Derek had dealt with demons before. He and Laura had ran into a few during
their time in New York. Demons run rampant in large cities. Contrary to popular
belief a lot of them are harmless. Just looking for a body to stay in for a
night out on the town. To be able to get drunk again. Stupid miniscule things.

But the ones who weren't like that were deadly. Vicious in every way
imaginable. Having little to no regard for the body they possessed. Some got
joy out possessing a body to just inflict pain upon it, forcing the host to cut
off entire limbs, set themselves on fire.
Making them watch as they kill significant others with their own hands. Some
would force their way into a body and inhabit it forever, slowly wiping away
the soul of the host until it was soley there body to inhabit.

Not all demons possessed equal strength. Some were stronger than others
depending on their ranking. Derek didn't know how far the rankings went, but he
knew the fundamentals.

The higher the ranking the more power the demon possessed. And this one inside
of Stiles must rank very high, because he was positive it was repressing his
strength. Which couldn’t be an easy task, he was an alpha werewolf. 
“You should hear him in here...he’s been screaming since I’ve possessed him. At
the top of his fucking lungs, I believe his throat is bleeding. He’s a fighter
this one.” it said as it walked in circles around Derek.
“I threatened to cut his tongue out but he didn't stop. But I couldn't do that
because well...like your little fucktoy I like to talk too” it laughed, with
Stiles voice...

Derek took a swift moment to look around the room. He was in a small room. No
bigger than the size of a restroom. The walls were solid concrete along with
the floor. The door to the room was large and metal, disgustingly rusted beyond
repair.

“What do you want with him!?” Derek shouted gnarling his blunt human teeth at
Stiles’ smirking face, without his consent. “WHAT DO YOU WANT!?" he shouted
this time.

Its eyes widened as if it were shocked and it hopped back.

“Uh oh! I think I made Derr Bear mad!” it gasped sarcastically. Derek would
usually joke around when Stiles’ called him that and tell him to shut up, but
right now? He reallywanted him, this thing, to shut the fuck up.

It sucked its teeth and waggled its index finger at Derek.
“Nuh uh. This bad attitude won't do. Hmmm, let’s see what I can do to get you
happy” it said cocking its head. Derek tried to look everywhere, anywhere else
but at the black pool of eyes staring intently at him.

Almost in an instant Stiles’ body climbed Derek’s lap, placed both feet
gracefully on either side of Derek’s hips and easily balanced both Stiles’ and
Derek’s weight on the small wooden stool. It took Stiles’ arms and positioned
them on his shoulders in an intimate gesture as it pushed the swell of Stiles’
ass into his crotch.

Avoiding the onyx eyes was inevitable now for the demon was directly in his
face, with that shitty smirk. And now it was touching him; grinding Stiles’ ass
into his crotch.

“I went through this little whores archive...he really loves it when you fuck
him like this." it moaned "When he gets to sit on your lap with your big
werewolf cock in his-”

“SHUT THE FUCK UP!” Derek barked in its face.

The smirk vanished almost instantly from its face and Stiles’ nose flared, the
sound of teeth grinding filled the silence in the room. The demon exhaled
inhumanly before it spoke. Bringing its face within centimeters of Derek’s.

“You tell me to shut up again, and I will put thispathetic, worthless piece of
shit through the worse pain you could ever imagine." It growled.
"I’ll sit here and swallow razors for fun or I could douse his body in
gasoline, set him aflame in front of you and force you to watch me heal
him...just to do it all over again” it whispered, stroking Derek's cheek with
the back of Stiles' hand.

Derek shook his head and fought back the tears that threatened to escape from
behind his burning eyes. “No, please...don’t”

“Hmm...I could even set up a gangbang. You have no idea how many old bastards
would love to fill this little twink up with their seed. I’ll have it recorded
and force you to watch as thirty-two men ruin your precious little Stiles.
Watch them all use him like a filthy slut...just like you do”

The tears were out of his control at this point, streaming down his dirty face,
burning hot trails on his cheeks. Tears of anger, of fury. He was furious
because he couldn't do anything, he was at the mercy of this thing. This
parasite.
“I will tear you apart” Derek growled.

It smirked again.
“Remember Derek? If you kill me, you kill him.”

“So what are you going to do kill me?” Derek asked, his voice was wrecked and
he couldn't stop staring into the eyes of the demon. Longing for the honey
amber irises he had grown attached to, wanting back the glow in Stiles’ smile.

“Oh no Derr Bear. I kill you, I can’t get what I want...so what do you suggest
we do, Wolfie?”
End Notes
     Oh yeah! I'm on Tumblr! http://sexysouralpha.tumblr.com/
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!