Chapter Text
The first time it happened was the day his cute new roommate moved in. While carting boxes, moving furniture, and getting himself set up in the spare bedroom, Castiel had pulled his shirt off, wiping at his forehead. Dean couldn’t really blame him for that, it was an unseasonably warm spring day and the guy had been working for hours. Dean had helped him move some of the larger stuff, but Castiel had insisted on doing most of it on his own.
So Dean was sprawled on the couch when a shirtless Castiel brought some broken down cardboard boxes to the door, setting them by the closet and promising to take them with him in the morning. Dean shrugged, not caring, and Castiel disappeared again.
A bit later Dean wandered into the kitchen thinking of having dessert, something sweet. He did a double take as he rounded the corner and caught Castiel completely naked in the kitchen. Castiel’s back was to him as he stood at the sink, downing a glass of water.
Dean stared with his mouth hanging open.
“Dude, what the hell?!”
Castiel turned, still gulping water and looked at Dean completely innocently over the glass.
“Oh. Sorry. I was just getting a drink.”
“Yeah, I see that,” Dean said struggling to keep his eyes on the man’s face. “You kind of forgot pants, Cas.”
“I was about to shower… Does my nudity bother you?”
Dean couldn’t answer at first, wondering why this man he’d only met in person once before—and very briefly—to see the apartment, was completely unperturbed, standing naked in front of him. He wasn’t embarrassed at all and Dean didn’t want to make things awkward on day one, so he tried to laugh it off.
“Naw, man, just, uh, surprised me. Not used to getting an eyeful of ass when I walk into the kitchen,” Dean grinned and Castiel nodded at him with a small smile.
Dean went to the fridge as Castiel left the kitchen. The cold air rolling out was welcome. Dean had gotten a good look at Cas and the guy certainly had nothing to be embarrassed about. He was slim, but not scrawny, with slight muscle definition and hip bones sharp enough to cut straight to Dean’s libido.
The very next morning it happened again. Dean wandered into the kitchen and Cas was leaning against the counter eating a bowl of cereal. Naked.
“Again!? Do you even own pants, Cas? Did you forget to pack them?”
Castiel tilted his head. “I thought it didn’t bother you.”
Something about the casual response made Dean pause. This wasn’t some weird accident. Cas wasn’t embarrassed at all. Waiting on Dean, he spooned more cereal into his mouth. Castiel licked his lips and Dean’s attention was drawn there. The guy had really nice lips, surrounded by his morning stubble. Dean felt proud of himself for keeping his gaze so far north, but Castiel’s big, blue, guileless eyes and his mess of dark, I’ve-been-fucking-all-night hair did nothing to help Dean’s thoughts stay innocent. Bother him? Of course it didn’t bother him. What could possibly bother him about having a sexy, naked man calmly eating cereal in his kitchen?
“It doesn’t. So, what, do you like being naked in public or something?”
This made Cas smile and shrug. “I wouldn’t consider this public, but at home, yes, I prefer to be naked. It’s just more… comfortable.”
“Awesome,” Dean responded, determined to play it cool as he got a cup of coffee.
“If it’s a problem—“
“Nope, not a problem, though I’d advise against cooking bacon like that,” Dean smirked at him over his mug of coffee.
Castiel put his bowl in the sink. “I’ll remember that,” he said, rolling his eyes and walking away.
Dean watched his progress out of the kitchen. Castiel’s ass was a delicious combination of plump and firm and Dean wondered if he was a runner or a swimmer or what. His thoughts strayed to the man skinny dipping, swimming through the water with those long, lean limbs. Muscles taut, skin all wet and maybe he’d lie in the sun to dry off—oh shit. Dean sighed and headed for the shower.
Just like that, Naked Cas was suddenly Dean’s new normal. Castiel worked inconsistent hours and always from home, so Dean was often coming in the door at the end of the day to find Castiel reading naked on the couch, sitting naked at the table, pacing naked on the phone. Always naked. Dean’s early attempts to be polite were soon forgotten and he let his eyes roam. The more he looked, the more certain he was that he liked what he saw.
At first he thought the boners would taper off as he grew more accustomed to seeing so much of Cas so often, but it didn’t work out that way. If anything, it got worse as the weeks went by. Soon every little thing about Castiel was screaming sex at Dean. The way he’d look up at Dean from the book he was reading or how he rolled his neck and shoulders if he’d been in the same position for too long. If Castiel was eating naked, Dean was done.
He made the mistake of cooking them burgers for dinner one night and when Cas joined him on the couch, moaning around mouthfuls and complimenting Dean, he had to pull a pillow onto his lap and pretend he was using it as a tray for his plate. When Castiel licked ketchup off a finger, Dean was reduced to thinking desperately unsexy thoughts to combat the bulge in his jeans.
To make matters worse, Cas had to have the most seductive voice Dean had ever heard. It was deep, dark, soothing, and spoke directly to his dick. Dean was battling a near constant state of arousal, but he had waited too long to tell Castiel that he had to stop now. He’d have to admit that his spank bank was overflowing with enough naked Cas imagery to jerk it at a moment’s notice. That conversation would not go over well—Cas was straight, had mentioned past girlfriends and probably wouldn’t appreciate the fact that Dean was constantly thinking of him in the shower. Not to mention the car. He had started beating off in there before going into the apartment, just imagining what he’d find Cas doing once he got inside. It had started as a preemptive strike to discourage hard-ons in the house, but now it was practically a daily necessity.
Of course, the one day he skipped his mandatory masturbation was when he walked into the apartment to find Castiel draped across the couch—his couch—on his stomach, naked and asleep with that fucking perfect ass of his bare to the world. Bared to Dean and he just couldn’t handle it anymore. He couldn’t keep his hands to himself, not when Cas was like friggin’ presenting himself to him. All at once he was beside Castiel, running a hand over his teasing ass.
Castiel didn’t stir and Dean fondled his warm, smooth skin a bit more boldly as he undid his own jeans, pushing them down with his boxers. Dean’s fingers dipped into the furrow of Castiel’s ass, halting over the heated pucker of flesh. Lube, his mind screamed at him and he was suddenly glad about all the jerking off he’d done recently since it had led him to keeping lube perpetually in his pocket. Scooping it out and squeezing some into his hands, Dean coated his fingers and returned them to Castiel, circling his hole and nudging that first one inside.
Tight heat greeted him and Dean closed his eyes to focus on it, holding his breath as he edged in further. Certain this would wake Castiel, Dean slowly exhaled, waiting and watching as he gently moved his finger. The reaction from Castiel was minimal, the slightest shifting of his head and a twitch from his hand that was hanging off the couch, dangling near the floor, before he was still once more.
Emboldened by Castiel’s lack of movement, Dean resumed his efforts, playing with himself as he watched his finger move in and out of that tight hole. Crooking it upwards, Dean tried to stretch Castiel, slowly dragging out past the knuckle and pressing back in. Amazed at his good fortune and determined to have more of his roommate, Dean brought a second digit to join the first. Rubbing at Castiel’s slick entrance and watching his fingers slip inside had Dean biting back a moan. It was so fucking tight and Dean took his time, gradually forcing them both deeper into the heat.
Castiel made a soft noise and Dean froze, fingers still buried inside him. He waited, but there was no other response from the sleeping man and Dean cautiously continued, plunging his fingers slow and deep. He loved watching their exit, the way the rim dragged over them and how, if he removed his fingers all the way, he could see Castiel's rosy entrance gape and flutter.
Sporting massive wood, Dean felt desperate to get into that hot, narrow hole and he stretched Castiel, gently moving his fingers away from each other and opening him up. Dean directed his cock so it was rubbing over part of Castiel’s ass as he added a third finger. Fuck if that nudist didn’t slept right through it.
“God damn, Cas,” Dean whispered over the slight squelching sound of repeated penetration.
The triple digits shifting in and out, surging deeper and deeper, drew some muted utterances out of Castiel, but Dean kept going. Feeling around the smooth, silky inside of his roommate, Dean slid in and out repeatedly, fingering that perfect, greedy hole, and pausing as Castiel shivered.
Dean smirked, convinced that he had glanced off the man’s prostate. Mesmerized by his sunken fingers, Dean pulled them out and pushed them in slowly, again and again. Unable to take it any longer, Dean slipped them out, thumbing Castiel’s hole and dipping briefly into the relentless heat before tugging at the rim and letting out a groan. He had to get in there. He needed to be inside Cas, like fucking yesterday.
After adding more lube to Castiel and fisting a slick hand over himself, Dean delicately brought one leg astride Castiel, settling his knee into the cushion. Leaning close and resting a hand on Castiel’s back, Dean rubbed the head of his cock over his slippery entrance before he began pressing inside.
Castiel sucked in a gasp as Dean sighed at the tremendous pressure that immediately surrounded him.
“Dean?”
Fuck. Sleeping Nudie was finally awake.
The drowsy uncertainty vanished from Castiel’s voice as he spoke again, trying to move as Dean put his weight behind the hand on his back holding him down.
“What the hell, Dean?! Get off me!”
“Shhh, Cas, you’re so fucking hot, just let me,” Dean said, sliding further into him.
They moaned in unison as Dean sank into him, covering Castiel’s body with his own and licking along the shell of his ear and down part of his neck.
“No. Dean, stop. I don’t want—“
“Don’t want what, Cas? You’ve been parading yourself in front of me for weeks, just teasing, inviting, wanting me to fuck you senseless,” Dean breathed against his ear, finally seated balls deep and groaning into Castiel’s neck at the delicious grip of his ass.
“No, I didn’t,” Castiel protested feebly, tensing.
Despite Dean’s thorough prep work, Castiel was still achingly tight and burning hot. Castiel clenched around him as he strained to escape from underneath Dean and it was so fucking good. Determined to move, Dean pulled back, almost all the way out, before driving himself in again, shutting his eyes and dropping his head at the sensation.
“You feel so fucking good, Cas, so damn good on my cock.”
He really deserved a friggin’ medal for resisting this temptation for as long as he did. Repeating the movement, he thrust deeply into Castiel, lifting his roommate’s hips from the couch and pushing his head into the cushion. With Castiel’s ass in the air, he was able to pound into him more enthusiastically. Castiel’s muffled gasps of ‘no’ and ‘stop’ tapered off, devolving into moans and noises of pleasure as Dean angled his hips, pushing repeatedly along his prostate.
“D—Dean, ahh!”
“Fuck, yes, Cas. Yes, I knew you fucking wanted this,” Dean said, strongly gripping his hips and driving recklessly into Castiel.
“Shut up,” Cas spat out, but he was no longer resisting.
Easing his thrusting, Dean stayed inside Castiel, parting his cheeks and rocking into him, absorbed in watching where they were connected. Slowly pulling further and further out, Dean groaned when Castiel pushed back, swallowing more of him.
“Jesus, fuck, Cas! So impatient. I’m gonna fucking give it to you,” Dean promised, seizing his hips again and banging them furiously together.
Castiel moaned at the increased pace, dropping his face back into the cushion and making unintelligible sounds as Dean rode his ass. A few times Dean thought he heard his own name and it sounded deliciously rough as it was wrung out of Castiel’s mouth. Spurred onward, Dean ground his hips into Castiel, who whimpered and clung to the couch, trying to remain in place.
“So good, Cas, oh, such a good fuck. Love your tight ass.”
Their skin slapped loudly together as Dean slid over and over into that tight channel, fucking fiercely into him. Castiel cursed and shuddered, clamping tightly around Dean as he moaned and painted white, hot ropes of come onto the couch beneath them. He shook through his orgasm, coming hard and fast and Dean found he wasn’t far behind, completely turned on by Cas coming untouched and the way he clenched around him.
Dean picked up the pace, jerkily ramming into Castiel, no longer caring if he was hitting the right angles. Dean just needed to come now and that welcoming heat was exactly where he wanted, needed to be. With a few more desperate thrusts Dean got there, shoving himself into Cas and shooting his load inside him. Grunting through the last few forward motions, Dean careened into Cas, coming with a final moan.
“Shit,” Dean panted after a moment, slowing pulling from Castiel who gasped as Dean slipped out.
Setting a hand on his ass, Dean bit his lip, watching his come ooze out of Castiel.
“What a fucking sight you are,” Dean said, trawling his fingers through the warm fluid and stuffing it back inside. Castiel made a guttural sound in response as Dean fingered him and played with his slick rim.
“Enough, Dean,” Castiel said, pulling away and slowly getting to his feet. He managed to glare at Dean, his face flushed and breathing still slightly off, before he strode from the room.
Dean wondered if he was finally going to put on some fucking pants.