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Dean usually doesn't go for nerds.
Not because he's prejudiced or something but because whenever he sees someone getting overly passionate about any nerdy topic whatsoever it reminds him so much of Sam that Dean's libido dies instantly. It might be the hottest guy or the cutest chick, it doesn't matter. As soon as he sees that specific glint in their eyes that only real nerds show he's outta there without a second thought.
So that’s why he has no freaking idea why he's going so utterly crazy for Castiel Novak then.
Perhaps it's because he's such a unique weirdo that he doesn't remind Dean of anyone. The way he speaks, the way he holds himself, even the manner he wrinkles his forehead – Dean has never seen it like this on any other person before.
He walks around the campus as though he owns it and at the same time doesn’t give a shit about any of it.
Sometimes he is ridiculously engaged – especially during that one lecture he shares with Dean – and sometimes he is aloof, living in his own private world and not caring at all what is going on around him.
He’s got range in all different directions and it’s so mesmerizing to watch that Dean is getting quickly addicted to it.
Furthermore, of course it doesn’t hurt that the guy is drop dead gorgeous. Tousled hair, supernaturally blue eyes, a lean body and thighs that could easily crush a man’s skull.
Dean drools after him on a regular basis these days, it’s getting actually a little absurd.
And so, on a sunny Thursday afternoon, he decides that he absolutely needs a piece of that.
It’s life and death at this point, there is no denying it.
---
The thing is, he doesn’t move in the same circles as Cas.
The guy has his own nerdy friends and they usually seem to hang out in various dorm rooms, probably in whichever is just closest at the time. Dean barely passes him in the hallways because he always appears to be somewhere else than you might assume.
Besides, more than company Cas enjoys his peace and quiet, therefore he is crawling into remote corners of the campus to read his two million books for hours there without interruptions. Probably not even an army of tracker dogs would be able to find him, so Dean certainly has no chance in hell.
Cas doesn’t participate in college events, campus activities or any grand or small dorm parties. He is not a social butterfly by any means and that makes it extra difficult to catch up with him.
The few times Dean actually does meet him around by chance, the guy usually either barely spares him a glance or just blinks at him in confusion when Dean has the audacity to greet him with a bright grin and quickly picks up his pace to not have to converse with the other.
So yeah, this seems next to impossible and yet Dean is determined not to give up that easily.
---
Three months after Dean’s conviction to tap that ass, no matter what, he breathes a sigh of utter relief when their professor pairs them up for a project.
So they end up in a quiet corner of the library after class and make a game plan.
And normally Dean would have flirted like crazy and put on his charm tenfold right away, but he knows that Cas appreciates a certain degree of seriousness more than anything, so Dean remains focused and enthusiastic, hits the books and makes all kinds of remarks which are obviously intelligent enough that Cas actually looks a little impressed by it.
At the end of the session the guy closes his book and states, “With you by my side this will be even easier than I thought.”
Dean can’t help a little pleased smile. “You assumed I’d drag you down and let you do all the work, right?”
At that Cas frowns. “No, of course not,” he says, sounding like that mere prospect never even occurred to him. “I know you are extremely smart and dedicated to the class material.”
Dean lifts his eyebrows. He can’t recall anyone ever saying that about him.
“You think so?” he wonders.
Cas nods. “Sometimes you hide your incredible intellect behind a boasting attitude which I assume is the result of a longtime adaption to an environment which doesn’t acknowledge a quick mind like yours. And you have some trouble getting used to the fact that around here you don’t have to pretend anymore.”
Dean simply stares at him. “… you don’t know me,” he comes up with in the end.
Cas glances at the book in front of him because apparently he can’t meet Dean’s gaze. “I see more than people realize.”
“So you’ve been people watching this whole time?”
Cas grimaces. “Most people here are rather boring.”
Dean finds himself smirking. “Not me, though?”
Cas doesn’t deem that with an answer, but a light flush shows up on his cheeks.
Dean rejoices.
---
For the next two weeks they work closely together.
Dean stays rigorous and devoted for most of it, but when they eventually start to reach the finish line, not many things to do but tying up a few loose ends here and there, Dean finds himself becoming more flirty by the day.
At first he just tests the waters, but when Cas doesn’t react negatively, even blushes occasionally, Dean goes all in. He uses his charm, his intellect, and soon enough Cas joins the game. More often than not he doesn’t even seem to realize, merely figuring they’re bickering about the stupidest stuff, and when he ultimately catches up he looks both astonished and flustered.
That doesn’t stop him from diving back into the dance all over again the next day, though.
It’s exhilarating.
Bantering with the guy, seeing his huge mind work, it gets Dean going like nothing before. Hell, a few times he manages to pop a boner under the table because it feels so arousing sparring with the guy that his body reacts on its own.
Dean surely thanks whoever will listen – the gods, their professor – that they were brought together.
---
They finish up their project ahead of schedule.
Of course Dean ends up very disappointed.
But just as they’re sitting in their by now familiar corner of the library, adding the finishing touches to the paper, while Dean is contemplating if there is a way to delay the inevitable, Cas suddenly announces, “Do you want to have intercourse?”
Dean nearly drops off his chair in surprise. “… um, what?”
“Do you want to have intercourse?” Cas repeats the question. “With me,” he adds, as though that wasn’t clear.
Dean blinks at him, for a few seconds so taken aback that he is unable to produce a single coherent sentence.
In the end he blurts out, “Seriously?”
Cas looks straight at him. “It is a serious offer, yes.”
Dean opens and closes his mouth on repeat, but no word leaves his mouth.
He is stunned speechless and that certainly hasn’t happened a lot in his life.
Kudos to Cas for that, at least.
“I just deem your company exceptionally stimulating,” Cas explains. “And I figured that adding a physical component to our relationship would be quite interesting and raise it to a new level.”
Somehow it sounds like he is talking about a science experiment.
Dean’s cock twitches in excitement anyway.
(Or maybe even because of it?)
“I can tell that you are attracted to me,” Cas continues, unashamed. “Your pupils dilate regularly in my presence, the constant fidgeting on your chair indicates that your genitalia –”
“Okay!” Dean is quick to cut in, his eyes wide and his cheeks flaming so hot it burns.
He thought he was being subtle.
Apparently not.
But considering that Cas has been watching him so closely for God knows how long already, it’s actually no wonder that he picked up on Dean’s pathetic crush soon enough.
“So, what do you say?” Cas wonders when Dean stays silent for too long, still too overwhelmed by the situation.
Dean gapes at him.
A part of himself sincerely wants to run because this is getting too real all of a sudden, but he shuts that voice in his mind off fast.
This is what he wanted right from the start, isn’t it?
Tap that ass.
So why would he hesitate now of all things?
“One condition, though,” he hears himself saying.
Cas tilts his head. “What is it?”
Dean scrunches up his nose. “Don’t call it ‘intercourse’, dude, okay?”
Thankfully Cas accepts the terms right away and they both rush out of the library a moment later.
---
They’re at least five more minutes out when Cas suddenly, right in the middle of them speed walking through the corridors to reach the guy’s dorm room, grabs onto Dean’s arm and shoves him into a nook with such surprising strength that Dean has no way to fight this.
He ends up shoved against the nearest wall, dazed and confused.
He doesn’t complain, though, because the next second Cas is aligning their bodies in such a manner it’s impossible not to feel their bulges through their pants. Cas’ gaze is flickering over Dean’s face for a moment, as if he is looking for something or just counting the freckles, before he all of a sudden pulls Dean in.
They kiss.
Dean makes a sound of surprise at first, but he quickly leans into the touch because at the end of the day it’s all he can do.
The kiss is deep and slow.
Passionate and sensual.
And it’s driving Dean utterly insane.
He loses himself completely before he even knows what’s happening and he cares about nothing anymore but Cas all over him.
The other students chattering along as they walk past their little nook? Unimportant.
The sound of someone’s phone ringing in the distance? Unimportant.
One random person passing them wolf whistling? Unimportant.
It’s just Cas and nothing else for Dean.
When Cas eventually – after seconds, minutes, hours? – draws away, Dean feels so dizzy his knees actually buckle a bit.
Meanwhile, Cas offers him a little smile.
Looking way too pleased with himself for his own good.
“Apologies for the brief detour,” he says, his voice so rough now that Dean actually ends up whimpering lowly. “I just couldn’t wait for this.”
He doesn’t stay around for an answer. Mostly because he can probably see that Dean isn’t able to give any sort of witty comeback right now anyway.
Instead he grabs Dean’s hand and pulls him back into the hallway, heading towards the direction of his room again.
While Dean stumbles behind him, not capable of believing his luck.
---
Ten minutes later Dean lies face first on Cas' dorm room bed, his legs hanging down on the side.
Also he's buck naked, his clothes lying sprawled all over the floor. As soon as they had walked over the threshold and closed the door behind them Cas had basically ripped any garment off Dean's body without any mercy whatsoever. Dean, too horny to protest the rough treatment, just let it happen, his cock growing hard again as Cas was busy destroying his shirt and afterwards shoving him onto the mattress.
Being flung around like a puppet surely did something to Dean's entire system.
He didn't have any chance to analyze this any further, though, before the first of Cas' fingers slid into him and Dean lost his mind.
Now they're up to three and Dean is finger fucked so hard he's actually drooling on the sheets, his brain melting into mush. Cas certainly knows how to work someone open, to scissor someone so expertly that they forget their name in a matter of seconds.
Dean is sweating like a pig and trembling so forcefully the bed is shaking and he can't recall ever being so turned on before in his life.
His ass is spread open wide and he never felt so good.
Fucking hell.
“Cas …” he slurs, his vision getting blurry in the good way. “Cas, Cas, Cas …”
There is no other word more important right now.
There is no other word Dean even remembers.
His world only consists of Cas right now and he is very much okay with that.
Cas, meanwhile, is very methodical about giving Dean pleasure. One time he is picking up the pace so much that Dean screams into the mattress, then he slows down when he notices the man at his mercy getting too close to release. It's an up and down, up and down, and it's both torture and the most amazing bliss.
Also Cas seems so focused on Dean that he didn't even take the time to undress himself. Sure, from the corner of his eyes Dean notices that Cas eventually opens up his belt to pop his rising erection out of the confinements of his pants, but apart from that he's mostly dressed.
Dean finds this hotter than he cares to admit.
Everything about this is hotter than he could've ever imagined.
Dean has honestly no idea what's even happening.
“You're opening up so nicely for me,” Cas purrs, his voice pure sin.
Dean just whimpers like a loser and holds onto the sheets for dear life.
Several more minutes he gets opened up to the point of near insanity before Cas eventually pulls out his fingers. Dean groans in disappointment, but swallows it down quickly when he is suddenly gifted with the privilege of watching Cas starting to undress himself.
Cas is quick about it, almost a little sloppy, as though having Dean naked and wanton on his bed is frying at least part of his brain and he doesn’t care that much anymore if some of his clothes end up crinkled.
It’s arousing in its own special way.
Soon enough Cas is very naked and Dean just has a brief second to admire his perfect physique before Cas plasters that delicious body all over Dean’s sweaty back.
Dean immediately feels the guy’s hardness brushing his ass and he shudders from top to bottom, so very excited for what is to come that he is barely able to contain himself.
When Cas slips his erection between his cheeks, Dean grits his teeth.
And when Cas' cock finally breaches his rim, Dean can’t do anything else but spasm.
He thought he was prepared after that masterful finger fucking, but boy, had he been wrong. The intrusion is so much more than he anticipated, his body basically split in half by the size of Cas, and Dean actually blacks out a second or two as Cas slowly glides deeper and deeper.
“Oh fuck –” Dean groans loudly as his hole is stretched impossibly.
Dean believed himself to be an expert on everything involving sex, but he surely never felt anything like this before. Not even his biggest dildos comes close to this feeling of that hot, pulsating flesh digging into him.
He blacks out for a minute or two and by the time he's coming back to it Castiel is fucking him hard and fast. Just dragging his cock out of Dean almost completely only to snap it right back in with such force the bed shakes dangerously. It's almost brutal in its efficiency and Dean gets addicted to it right away.
So he just lies there and grunts and moans while Castiel drives into him so fast he might very well be a bunny on steroids during mating season.
Dean takes it, presents his ass like a gift for the Gods, while his whole body starts to burn like crazy. Every single nerve ending inside of him seems to be alight at once and it's such a delirious sensation that Dean's brain begins to swim again.
There is no coherent thought in his head anymore. The only thing he's able to come up with is FUCK FUCK FUCK FUCK …
And that's what they're doing.
Castiel continues to fuck and Dean continues to take it.
At some point – minutes or maybe hours later – Castiel's movements falter a little and Dean just has a second to notice that little detail before he gets whirled around, the well-built nerd once again demonstrating surprising strength, and Dean ends up with his back against the mattress.
He blinks up in confusion, his gaze dazed, and he just has a brief moment to glance at his own cock, so hard it appears ready to burst, before Castiel grabs Dean's legs, throws them over his shoulders and bends Dean in a way that he should never be bent.
Dean opens his mouth, on the brink of protest, but then Castiel pushes his erection right back into Dean's hole and Dean blacks out once more.
By the time he is aware of his surroundings again Castiel has gone back to his fierce pace. Now, however, Dean can watch his facial expressions and he is thrilled at the way Castiel's jaw is clenched and his pupils blown up so wide his eyes seem black. He grunts with every hard thrust while sweat runs all over his body.
“Oh fuck …” Dean slurs, becoming even more delirious. “… please don't stop … fuck me … don't ever stop …”
Dean certainly would be amendable doing this for the rest of his life.
Castiel at least puts even more energy into it, like he's keen on following Dean's request to the letter, and the mattress bends so hard with every forceful snap of Castiel's hips that it feels like they're actually touching ground. The bed might very well be ruined after this and that thought arouses Dean like nothing ever before.
“Fuck, babe …” Dean moans. “… you're so hard … never had anything so hard before …”
Castiel looks utterly pleased by this and rewards those word by wrapping one hand around Dean's raging erection.
Dean screams.
He just can't help himself. Normally he is subdued during sex, tries to keep as much control as possible, but Castiel has stripped him bare and only left a pile of lust and ecstasy behind. Dean trashes around as he fucks into Castiel's grip while simultaneously trying to meet his thrusts and he's so overly stimulated that he ends up groaning and whimpering and yelling, all at the same time.
It takes no time at all for him to become a sweating and drooling mess.
When his impending orgasm announces itself by gathering all the blood and heat in his loin area, Dean actually sobs, way too overwhelmed by all the emotions.
“I'm coming,” he cries, “I'm coming, OH GOD –”
When he eventually explodes and his come shoots out so hard of him it looks like it's close to hitting the ceiling, Dean loses the last thread of control and he releases a series of rather unsexy grunting noises that sound like a cow giving birth.
He trembles and flails as his cock twitches all over the place, seemingly having lost every last bit of control.
And the orgasm feels like it takes forever, with Castiel fucking him through it the entire time.
When Dean has eventually gotten soft and all energy has been drained out of him, Castiel slides out right away. Dean wants to tell him it's okay, wants to reassure him that he can keep on ravishing him until his own release hits him, but he finds himself unable to form any coherent words. He just babbles absolute gibberish as his weak body sinks into the mattress.
Castiel, at least, seems quite turned on by the sight of Dean being completely debauched. He rips the condom off his stupidly hard cock and strokes himself furiously while watching Dean's destroyed state with nothing but lust in his eyes. He growls and fucks into his fist hard, clearly eager to reach the finish line as well.
Dean opens his mouth to encourage him, but he only slurs something intelligible. Like Castiel screwed all the brain matter out of him.
That sends Castiel finally over the edge.
He makes the most delicious noises as his orgasm washes over him and Dean watches rapidly how Castiel's come splatters all over Dean's body. Castiel seems determined to mess him up a great deal and Dean has absolutely no objections to that.
He just watches through a fog of daze how Castiel's face goes completely slack as he empties himself over Dean, with the last drops actually hitting Dean's face, and then slumps forward, hitting the mattress right next to him.
Dean wants to say something. Want to reply something witty, wants to be honest and tell him that this was the best fuck of his life, wants to urge the guy to stand up and clean them both up, but in the end he is too weak for any of that.
He drifts off to sleep the very next second.
---
When Dean wakes up, according to the sun shining through the window many hours later, he is in exactly the same state as before.
Lying on top of the sheets, naked, and crusted semen all over his body. He is also very sore, his ass feeling like a truck drove through it.
It's amazing.
Dean grins dazedly at the ceiling for a while, still experiencing the rush of what happened last night, before turning to the side and realizing that Castiel is looking at him. Maybe has been staring at him for quite a bit at that point.
“You creeper, have you been watching me sleep?” he asks, trying to sound accusatory, but the big smile on his face probably belying his words.
Castiel just huffs. “You're entertaining to watch.”
Dean tries to think of a sarcastic remark, but he comes up empty and eventually opts out of the situation by leaning in and kissing the guy. They both have morning breath, but neither of them cares, and soon enough they're tightly entangled with each other and lost in a heavy make-out session.
It’s one of the most awesome experiences of Dean’s life, that’s for sure.
“So, what do you say?” he wonders after a while, when he is busy peppering fevered kisses down Cas’ neck. “I don’t know about you, but I think that adding the physical component to our relationship was really stimulating.”
Cas hums as he leans his head back a little to offer Dean better access.
“Well, I don’t know,” he says. “I believe we have to collect further data.”
Dean grins against the guy’s skin. “Oh?”
He likes what he’s hearing.
“Only one set of data is not enough to come to a proper conclusion, don’t you think?” Cas goes on. “We should … explore this further.”
With his last words his fingers wander down Dean’s spine until they brush over his ass.
Dean trembles.
“What do you have in mind?” he asks, already sounding completely breathless.
“Well, first of all, it would be irresponsible not to take advantage of your current state,” Cas points out while his fingers shamelessly slide down between Dean’s cheeks.
Dean’s breath catches while Cas lazily rubs his entrance, still slick from last night, and then pushes one tip in. It’s not deep, nothing more than a gentle tease, but Dean already breaks into a sweat.
“… yeah … irresponsible …” he croaks in agreement.
“So yes, we should collect more data right now,” Cas continues, his voice becoming more gravelly by the second. “And afterwards I will invite you to breakfast.”
Dean leans deeper into Cas’ finger. “Yeah?”
“Nourishment is important,” Cas points out as if he actually expects Dean to complain about food. “And essential after such strenuous activities.”
“Strenuous, huh?” Dean rasps, his vision already getting a little foggy. “What do you plan to do with me then?”
Cas merely smiles. “Everything.”
He says, all casual.
Dean’s nonchalant morning wood gets so hard so fast he groans.
“And tonight,” Cas adds, utterly ignoring the effect he has on Dean, the bastard, “we are going on a date.”
Dean can’t help it, despite his tense situation he laughs. “Oh yeah?”
“Yes,” Cas confirms. “It is decided.”
Dean reacts by yanking the guy into another kiss.
And so, a few minutes later, when Dean is busy gripping tightly onto the sheets again and moaning loudly enough for the whole dorm to hear while Cas takes him even more ferociously than the day before, he has to admit to himself that he might have a thing for nerds after all.