Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/1858596.
  Rating:
      Explicit
  Archive Warning:
      Choose_Not_To_Use_Archive_Warnings, Underage
  Category:
      M/M
  Fandom:
      Supernatural
  Relationship:
      Castiel/Dean_Winchester
  Character:
      Dean_Winchester, Castiel
  Additional Tags:
      werewolf!Dean, human!Cas, Rough_Sex, Bloody_Sex, Knotting, Castiel_is_17
  Series:
      Part 2 of Big_Bad_Wolf
  Stats:
      Published: 2014-06-28 Words: 1903
****** Bad Moon On The Rise ******
by DirtyTeaSpoon
Summary
     It's been two weeks since Cas discovered Dean's wolfy secret and
     Castiel is antsy for Dean to touch him again.
Notes
     This probably wont be my last exploration of this verse. I like
     writing Dean as a werewolf.
     Don't forget to follow on Tumblr! I often end up posting things there
     before I post them here.
     dirtyteaspoon.tumblr.com
    It was the night before the full moon. The first one since Castiel had
learned about Dean's wolfy little secret. It had been two weeks since that day.
Two weeks since he'd woken up on Dean's couch to find the house empty, slowly
redressed and shuffled back to his own home, absently showered and tucked
himself into bed. 
    He and Dean hadn't had another incident since that day, and they hadn't
even spoken about it, but Castiel would catch the man watching him whenever he
took the garbage out or mowed the lawn. He would some times catch a glimpse of
the golden glow in Dean's eyes as he watched. Castiel was going crazy after two
weeks of it. Two weeks of those looks and the staring and of Castiel getting
unbelievably turned on every time, and having to go take care of himself on
that wolf dildo that he called Dean.

    Castiel was antsy and he couldn't take it anymore. Clad in a bright red
hoodie, he'd devised a plan to sneak out and go to Dean. The flaw in that plan,
he found, was that his window was a lot more difficult to sneak out of than
he’d expected. His room was on the second floor, and the roof ran under it, but
once Castiel climbed out, he realized the roof was much more slanted than he'd
anticipated. Ten minutes passed as he sat just under his window, clutching onto
the ledge for dear life, trying to gather the courage to make it to the end of
the roof and climb down the gutter pipe.

    Two deep breaths and a count to ten later, Castiel was shuffling slowly
down the roof. As he was starting his decent down the gutter pipe, Castiel
heard a very ominous rustling noise. With his head whiping around to find the
source, Castiel lost his handle on the pipe and suddenly the ground was rushing
up the greet his back.

    Castiel stayed there for a moment, sprawled out in the grass, thinking
himself a crazy person. This was a terrible idea. Stealth was not one of his
strong points.

    The rustling sounded again, bringing Castiel back to himself and scrambling
to sit up. He was a little banged up, with a pain running up his back, but he
was otherwise alright. That was, until there were massive paws colliding with
his chest, sending flat on his back once again, trying to regain steady
breathing.

    The creature – a wolf – was enormous. Dangerously sharp claws dug into
Castiel's chest, making tears in the fabric of his hoodie. The wolf bent it's
massive head, panting hot over Castiel's face. It had dusty brown, shaggy fur
and yellow-green eyes that glowed in the light of the moon. Castiel knew those
eyes. It was Dean.

    “Uh... hi?” Castiel squeaked.

    As silly as it sounded, Castiel could swear the wolf looked amused. And
then there was a rough tongue licking over his face, over his lips and down his
exposed neck, and Castiel closed his eyes. A small smile played on his lips.

    Dean's weight was suddenly gone from Castiel's chest. Confused, Castiel
opened his eyes to see Dean retreating away from his yard. He scrambled up off
the ground and hastily ran to catch up with Dean's quick trot.
“Where are you going?” Castiel thought maybe he'd done something wrong.

    Dean just kept up his pace, so Castiel followed. They passed neighboring
houses, and then left their street entirely, heading for the wooded area
nearby. Castiel took in his surroundings as they made their way deeper into the
trees. He couldn't see houses anymore, just moss and dirt and the decaying
leaves of the mid autumn season. The trees were still full of color; beautiful
yellow and red and orange hues.

    He'd been so occupied with where he and Dean were going, that Castiel
hadn't realized that Dean was disappeared. Castiel was alone in woods. Or so he
thought. Just as panic was starting to set in, Castiel heard a noise to his
left, like twigs snapping and crunching leaves. He turned to see Dean, in his
full human (and completely naked) glory, emerging from a thicket of trees.

    Well, he mostly human anyway. Castiel could Dean still had claws. His eyes
still had that yellow glow, and they were brighter than they had been in his
wolf form. Dean's mouth twisted into a devious smirk as Castiel looked him
over.

    “Hey there, little red riding hood.” Dean said, voice rough. “Off to
grandma's house?”

    Castiel looked down at himself and blushed. He'd worn the red hoodie on
purpose. He thought it was clever.

    “Don't you know you shouldn't wander the woods alone at night?” Dean said
with a grin. He was stalking over to Castiel slowly, like he was approaching a
timid animal. Like Castiel was prey. Castiel could see Dean's cock, obviously
hard, thick and bobbing against his thigh as he walked, foreskin pulling back
to reveal the head glistening in the moonlight that streamed between the trees.
“There's a full moon tomorrow. You never know what kind of crazies you're gonna
run into, Cas. Lotta people to take advantage of a pretty little thing like
you.”

    Castiel's mouth went dry. Dean seemed to have a weird spell on him. He
couldn't find his voice and he couldn't take his eyes off the man. Castiel was
achingly hard in his jeans, and he had been since he'd started sneaking out his
window.

    Dean stopped walking just in front of Castiel. “Ya know, it's not very
smart to seek out a wolf this close to a full moon.” Dean said, so low it was
almost a whisper. He ran a sharply clawed finger down the cloth of Castiel's
hoodie before leaning in and whispering directly into Castiel's ear. “I want
you to keep this on when I fuck you.”

    Castiel shivered, and not from the slight autumn chill in the air.

    Suddenly, Castiel was being herded backwards, nearly stumbling over roots
and sticks, until his back collided roughly with a tree. Dean wasted no time
before his lips were on Castiel's and his tongue was invading the boy's mouth
like he was starved for it, drawing a startled moan.

    Castiel's hands roamed Dean's naked torso, feeling the firm yet subtle
muscle there, covered in a thin sheen of sweat. As Castiel's hands made their
way down to Dean's thighs, the older man pulled away from Castiel's lips to
gasp for air, panting like a dog.

    “Fuck” Dean whispered. His eyes were heavy lidded, making him look drunk
with lust.

    Dean dug his claws into the meat of Castiel's hips and the younger man
could feel them pierce the cloth of his clothing and create pricks of blood on
his skin. That was what Castiel had been longing for. That was what he craved
the most. Dean was rough with him. He left marks. For a week after that first
time, Castiel was able to look in the mirror every day and see the evidence on
his flesh in the form of healing scratches and bite marks. He could touch them
and feel the tingle of Dean. He touched them every time he got himself off.

    Dean's hands moved down to the younger man's jeans, popping the button. The
sound of his zipper seemed deafening in the quiet of the trees and it made
chest flutter in anticipation. Dean roughly shoved Castiel's jeans down just to
above his knees. Castiel was never a fan of underwear, and this night was no
exception. Dean manhandled him until the younger man's face was pressed to the
tree and he was slightly bent at the hips, sticking his ass out and feeling the
tingling bite of the chilly air. Dean traced the curve of Castiel's ass lightly
with a claw and it tickled, making the younger man squirm, which earned him a
sharp slap. Castiel yelped in surprise.

    Castiel had been prepared. He's wanted this, and he made sure he was ready
for it before he sought Dean out. The older man spread his cheeks, revealing
the shiny silver plug Castiel had put in after he'd thoroughly prepped himself
earlier. Castiel heard the older man's soft, breathy laughter behind him.

    “What's this, Cas?” Dean asked as he started to push on the plug. Castiel
gasped. “Were you expectin' somethin'?”

    “'S been two weeks, D-” Dean twist the plug. “-eeen.” Castiel moaned.
“Needed it. Needed you.”

    Dean bent down to whisper in Castiel's ear. “All ya had to do was ask.”

    without warning, Dean pulled out Castiel's plug, leaving the boy's hole
empty and twitching in the cold air. Castiel whimpered.

    Castiel needed it bad. He needed to feel Dean inside him. Needed to feel
his body heat. Needed Dean filling him up and knotting him. Needed him to leave
his marks. Castiel spit in his hand, reached back and took Dean's cock, giving
it a few pumps before guiding it to his hole.

    Castiel shifted slightly to look behind him at Dean. “My, what a big cock
you have.” He said with a smirk.

    Dean's deep laugh rumbled through the younger man. “All the better to fuck
you with.”

    And then Castiel was being breeched. The head of Dean's cock slipping in
and Castiel sighed in relief. But it wasn't enough. Castiel wanted all of it,
and he didn't want Dean's patience or gentleness. Castiel shoved back roughly,
taking all of Dean to the hilt and making the older man shout in surprise.

    “Holy shit, Cas.” Dean moaned. “F-fuck.”

    Claws once again sank into Castiel's hips, holding him in place as Dean
slowly pulling out and then roughly shoved back in as hard as he could. Castiel
had to brace himself against the tree, blunt nail digging into the bark as Dean
set a brutal pace, hips pistoning and claws digging in deeper. Castiel could
feel the blood starting to trickle down his thighs. Dean was hitting the
younger man's prostate on nearly every thrust, and Castiel could feel that
familiar heat building in his gut. Like a wildfire spreading throughout his
body.

    “Fff-uck. Dean.” Castiel panted. “Want you to mark me.”

    Castiel heard Dean moan at that, before there were teeth sinking into the
back of Castiel's neck.

    That sent Castiel over the edge. He was coming with a shout, spilling onto
the tree he was holding on to. Dean fucked him through it, his hips starting to
falter as Castiel's ass gripped him tight. His knot was starting to swell, and
Castiel could feel it as Dean's pace slowed and he started to grind against
Castiel's ass.

    “Ffff-uck. Gonna fuckin' breed you like a bitch.” Dean was nearly
breathless as he spoke.

    “Do it.” Castiel whined.

    With one final sharp thrust, Dean's knot penetrated Castiel. The younger
man writhed under Dean's weight, grinding his ass against his pelvis and
feeling that swollen knot pressing against his prostate and leaving Castiel
feeling overstimulated in the best possible way. Castiel's actions pushed Dean
over the edge and the older man was coming with a rough moan before biting into
the back of Castiel's neck once more, rutting against the younger man through
his orgasm.

    Feeling sated and deliciously full, Castiel shifted to look back at Dean
once the man released his neck. He gave the older man a tired smile and Dean
returned it.
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!