Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/10765548.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Supernatural
  Relationship:
      Castiel/Dean_Winchester
  Additional Tags:
      Cas_&_Dean_are_17, Choir_Boy!Cas, Top_Castiel, Bottom_Dean, Top_Castiel/
      Bottom_Dean_Winchester, Rimming, Anal_Fingering, Anal_Sex, High_School
      AU, very_losely, lol, Sex_in_a_Church, Church_Sex, Altar_Boy!Dean, First
      Time, Virgin_Castiel, Virgin_Dean, Blasphemy
  Stats:
      Published: 2017-04-30 Words: 1732
****** Sunday Afternoons ******
by DaydreamDestiel
Summary
     Prompt from @ererishipperrrrr: My opinion is there isn’t enough
     teenage Destiel that takes place in a church. I desperately need
     bottom!altarboy!Dean getting rimmed and fucked by
     top!choirboy!Castiel and of course it would only be appropriate if
     Cas teases Dean about his limp later that day at Sunday dinner at one
     of their folk’s house. Again thank you, you don’t have to take this
     one of course XOXO
Notes
     Well this was fun to write. So much fun. I seriously loved this
     prompt. XD
Hard to believe that a half an hour ago Dean’d been sitting patiently up in the
balcony at his church watching Cas as he practiced with the rest of the choir.
There was something extra beautiful about Cas when he sang, something awe
inspiring about the way his voice projected emotion and Dean would never be
over getting to watch him sing.
Fifteen minutes ago the choir finished and slowly filtered out. Left Cas and
Dean behind to tidy up like they did every Sunday afternoon. Older than most
altar boys, Dean was seventeen and in his senior year of high school. Cas was
the same age as him, but he went to a local private school.
One of the benefits to serving on Sundays was the extra time he got to spend
with Cas. His parents thought it was fantastic that he was so dedicated. Gave
him a lot of leeway he wouldn’t normally get with his dad’s rigid scheduling of
everything he and Sammy did. Sundays though, he got a bit of freedom because he
was supposed to be cleaning up with Cas. And they would. Later.
Right now, Dean was perfectly content up in the balcony, his pants pulled low
on his thighs. His head rested on his forearms, ass in the air while Castiel
lapped slowly at his hole. Sent shivers of pleasure up Dean’s spine with every
hot wet flick of his tongue. Felt freaking awesome, but he had to be quiet just
in case anyone came back in. Should probably bother him more that they were
doing this where they were, but Dean’d gotten over his guilt a while ago when
it came to Cas.
His breathing was choppy, ragged and beads of sweat stuck his shirt damply to
his back. Cas’s fingers dug into the groove of his hip as he held Dean still.
Slowly slid his tongue inside Dean so fucking perfect that Dean’s dick ached
with it. Took everything Dean had not to reach down and jerk himself off, but
Cas liked to do that himself and Dean knew it’d feel better if he waited.
He bit his bottom lip hard to keep back the desperate sounds that wanted to
claw their way out of his throat. God, he fucking loved this. Loved the way Cas
got so damn focused on taking him apart piece by fucking piece. Wasn’t long
before Cas had a finger shoved in alongside his tongue, pushing and twisting
inside him and Dean arched back into it. Did his best to fuck himself back onto
Cas’s finger and tongue but Cas’s grip on his hip kept him from getting any
traction.
Fuck, he hoped Cas’s fingers left bruises there. Suddenly everything stopped
for a second and a tiny click echoed in the silent church.
“Cas, what-” Dean whispered.
“Shh.” Cas said softly, kissed Dean’s ass cheek and whispered back against his
skin, “Said last week you wanted me to fuck you. Still want that?”
“I-God,  yes.  But where did you-” Dean started to ask where he got the lube,
but two slick fingers circled his hole and he had to press his lips tightly
together to keep from moaning.
“Just relax, I’ll take it easy.” Cas said as he slid his fingers in nice and
slow.
Worked Dean perfectly with deep thrusts of his fingers aimed right at that spot
inside him that jolted heated bolts of pleasure through him. Scissored and
stretched him until his body wordlessly begged for more. Three fingers and Dean
sucked air in harshly through his nose at the sting. Cas’s lips and tongue on
his back helped soothe the tension from his body and fuck, Dean wished he could
moan. Wished he could be loud and beg Cas to fuck him, beg him to come inside
of him.
Couldn’t though, so he bit the back of his hand, tried to breathe through the
arousal that threatened to consume him any second now and wouldn’t that be
embarrassing? If he came all over himself before Cas even got his dick in him.
He clamped down hard against his own climax as the image of that flashed behind
his eyelids. So hot.
Like he knew how close Dean was to losing it, Cas’s fingers slipped slowly out
and Dean heaved a relieved breath. Quiet wet noises filled the air and Dean
glanced over his shoulder just in time to catch Cas give his dick one last
quick slick stroke before he moved forward, lined himself up and then pushed
gradually into Dean.
So much bigger than his fingers, Dean dropped his head back down, bit harder on
his hand and tried not to think about how he’d explain the teeth marks later.
Burned and hurt a little as Cas slowly bottomed out, hips flush with Dean’s ass
but felt so fucking good too. Cas was  inside  him. And God, Dean felt
connected to him, an overwhelming flood of warmth that filled his chest as Cas
draped himself over his back. Kissed just under his ear and held himself as
still as he could while they both got used to this new feeling.
Dean wanted to tell Cas he loved him, needed him, loved  this  but he kept
himself quiet and took deep, steady breaths. Willed his tense muscles to relax
until they obeyed and Cas breathed, “Okay?” in his ear. Dean nodded, didn’t
trust himself to speak right then and Cas smirked against his skin.
Little grinding rolls of Cas’s hips lit him up with sensation and Dean bucked
back against him as they built up into a steady pace together. Never done this
before but his body knew just how to move. A few times their thrusts went
erratic, mistimed, and Dean wanted to growl with frustration each time.
Eventually though, they really figured it out and fuck was it worth it.
“Yeah,” Cas whispered hotly against the overheated skin of Dean’s neck, “Just
like that baby. Feels so good. Love being inside you.”
Dean’s eyes squeezed shut, God he loved Cas’s voice. He’d give anything to do
this somewhere he could really let loose at. Hear all the dirty filthy things
he knew Cas was barely keeping back.
Cas shifted up to kneeling, got one hand on Dean’s hip, the other on his dick
and just wrecked Dean, “Gonna come for me?”
“Ngh.” Dean groaned as he pushed himself back onto Cas’s dick, forward into his
fist over and over. Couldn’t ‘ve stopped that little grunt for the world. Lost
in lust and Cas and the freight train of his rapidly approaching orgasm.   
“C’mon, wanna feel you come, Dean.”
Like Cas’s words had a direct line to Dean’s dick, his body tightened and heat
built fast in his groin. He held his breath as everything focused down on Cas
moving inside him, Cas stripping his dick and then his back bowed as the
tension in him snapped. Came with a stuttered gasp of Cas’s name that sounded
way too loud in his own ears. Sticky come coated Cas’s fingers and the hardwood
floor and Dean felt so good he thought he’d never come down.
Then Cas’s hips jerked and Dean sucked in another desperate breath as his ass
was flooded with hot wet spurts of come. Instantly fucking addicted to the feel
of Cas coming inside him, marking him up. Knew he wanted to do it again and
again. Just wished they didn’t have to wait until next week for some time
alone. Cas collapsed over Dean’s back, and for long moments they just floated.
But the longer they stayed like that the higher the chance they’d get caught,
so all too soon, they cleaned themselves up as best they could. Did a better
job in the bathroom and then made sure they cleaned the balcony extra good.
Once the endorphins wore off a little, Dean realized just how sore he actually
was. It was a good ache though, like a reminder of what they’d done and more
than once over the course of the afternoon Dean’d had to adjust his half-hard
dick in his pants. He caught Cas eyeing him appreciatively each time too, and
his cheeks flushed in response when Cas smirked at him.
Sunday dinner at Dean’s house was always kind of a big deal. His mom made a big
meal and they were allowed to invite a friend over, so of course Dean always
chose Cas. Dean’d just come back from grabbing the pitcher of lemonade from the
fridge at mom’s request when Cas innocently tilted his head.
“Dean, did you hurt yourself earlier when we were cleaning?” Cas asked and
Dean’s eyes widened with surprise, a half-formed  what  on the tip of his
tongue, “I just noticed you’re having a bit of trouble walking.”
“I- I, um.” Dean’s cheeks heated and he forced himself not to outright glare at
Cas, because that’d just raise suspicions. “Yeah, I slipped on the stairs. I,
uh, jacked my knee up a little, but I’m- it’s fine.”
“Dean, you should’ve said something.” Mom said, her voice tinged with concern.
“Sam could’ve gotten the lemonade. Maybe I should take you to the ER?”
“No- mom. No, it’s fine. It’s just a little sore. Not a big deal. Swear.” Dean
reasoned, slightly panicked.
“Are you sure?” She asked with a frown and at Dean’s insistent nod she relaxed
a little. Cas caught Dean’s eyes and a smirk turned up the corners of his lips.
Dean had to fight not to roll his eyes at him. “Okay, well after supper maybe
you should relax with some ice on your knee. Sam’ll do the dishes tonight.”
“Mom!” Sam protested indignantly, “I did them last night!”
“Sam.” Dad said low and firm, no room for argument.
Angrily, Sam crossed his arms and stared at his plate but he didn’t protest
further.
After dinner, settled on the couch next to Cas, a bag of ice wrapped in a towel
pressed to his knee, Dean glared at Cas.
“Thanks for this.” He muttered.
“Hey, got you out of dishes.” Cas pointed out after he laughed. “And plus, you
do need to rest up.”
“Yeah, for what?” Dean said sarcastically.
“Next week.”
Funny how fast Dean got over Cas putting him on the spot like that, but the
flare of heat in his gut definitely helped soothe his ruffled feathers.
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