Chapter three: Canine!Alpha! Dean and Feline!Omega! Castiel. Mostly smut with a bit of fluff.

Omegaverse, neither are human this time around. Think Neko!Au, but only about half the population have the ears and tail of a cat. The other half have the ears and tail of a dog. Felines and Canines, respectively. Imagine the adorableness that is Castiel with a long black tail and cute black ears. For Dean I was thinking wolf-like ears and a matching tail, dark blond of course. Let me know what you think! :)

Enjoy!

Edit 1/15/23: Updated Tags- Omegaverse. D/S elements. Hickies. Flirtation with exhibitionism. Creampie. Butt plug.

Castiel had just intended to visit his mate, really. Their offices and departments were on opposite sides of the campus, and he had a three-hour gap between classes in the middle of the day. He knew Dean only had a two-hour gap, and while they both liked to use this time to grade various tests and assignments, if they had time sometimes they'd pop over for a visit. Maybe the college would have put up more of a fuss about two of their professors getting married, but Castiel was in the English department, Dean in Engineering. One specialized in languages, the other in mechanical engineering. Besides, they liked to promote diversity, and that image wouldn't be improved if they protested two teachers of different breeds getting hitched.

No one thought twice about seeing their Russian teacher making his way through the sprawling engineering building, though a few shot him the odd glance. His ears twitched, but otherwise he tried to ignore them. He kept his ears up, alert. For whatever reason engineering tended to attract more of the Canine breed, something Castiel suspected was due to the major's practical applications. He knew for a fact Dean had a penchant for it, fixing up cars in his spare time. He himself mostly dealt with the more manageable Feline students. Quieter, intent, studious Felines. Not easily distracted, rowdy, energetic Canines.

Don't step on my tail, just don't step on my tail, he hoped silently. He was keeping it tucked in close, but a class had just let out, and he was rubbing shoulders with hundreds of-

A yelp, a yowl really, was torn from his lips. An automatic reaction to having the tip of your tail caught between a shoe and the floor. Immediately a circle opened up around him as Canines scattered at the sound, which only made things worse as people started to trip, including Castiel himself. He hit the wall hard, ears going flat as chaos broke out. People were either trying not to move or cringing from the sound or bolting. The handful of Felines in the crowd were among those bolting. He didn't blame them. Their tails were notably longer than those of Canine's, and when they were getting stepped on smart Felines got clear. Add to that the crowd was mostly Alphas and male Betas, breeds who liked to push back when they got pushed, and you had a recipe for a possible riot.

Castiel tried to get out, sidling against the wall, but he got all of three feet before an oversized Canine got shoved into him, pinning him. The Omega smothered another yelp, staggering as the Alpha shoved off to throw a punch at whoever had punched him. Castiel gasped, lurching forward. The mass of students were stampeding to the main doors, to open ground where they could disperse, but it was a struggle to fight the current. It was one good thing about Canines, they got into these messes so often they were trained to go for the exit and scatter if a riot started to brew. In ten minutes, they'd forget it had even happened.

As things stood, Castiel barely made it out without falling and getting trampled. He heaved a wary sigh, glancing back at the mess behind him before continuing on. Sadly, this wasn't the first time he'd gotten unlucky with a class release while trying to see Dean. He was almost used to it.

He got passed the lecture halls, taking an elevator up to the fourth floor where the offices were clustered. The Feline was reaching up to knock on the closed door when it was jerked open, Dean stopping in his tracks, a surprised look on his face. Slowly, Castiel lowered the hand raised to knock, his ears lifting as he relaxed.

"Hello, Dean."

"Cas, what's up?" The Alpha stepped back, setting his jacket back down on a nearby file cabinet.

"I wanted to see you. Also I wanted to show you this."

He fished a sheet of paper from the pocket of his trench coat, unfolding it and handing it to his mate. The Feline waited, tail twitching behind him in anticipation. Dean took it, glanced at the words, then read over them more slowly. His eyes slowly narrowed, then widened, his tail beginning to wag behind him.

"I would have waited until your birthday or Christmas, but the timing wouldn't work. Charlie's been nagging you to go with her to Comic Con, and now you have a reason to go."

He might have said more, but Dean set down the reservations and the tickets. The Canine took his mate's face in his hands, planting a kiss squarely on his mouth. Castiel's ears pricked farther forward, his own hands coming up to grab the Alpha's shoulders.

When Dean pulled away, letting them both get a breath of air, Castiel asked breathlessly, "How long until your office hours?"

"Long enough," rasped Dean, pushing him back against the door.

Castiel's hand fumbled, twisting the inner lock before running a hand through Dean's hair, fingers stroking the base of his ears. While he hadn't anticipated Dean displaying his joy in this manner, he was hardly complaining. Besides, they really did have time. They'd just gotten through midterms, both had been busy for the last two weeks, and sex hadn't been on the table in almost twice that time.

"I-I'm glad you like your present," Castiel gasped, when Dean pulled away to trail open mouthed kisses down his throat. "No hickies, I have a class this afternoon- ah! Nothing- nothing that will show."

"What's the point if they don't show?" the Canine rumbled.

What protests Castiel had left were reduced to mumbled whines, muffled should someone hear. He gave a soft gasp as a leg was braced between his own, a warm thigh pressing against his crotch. His hips bucked, earning a growl from his mate. The next gasp was almost a whimper, uttered as teeth sank lightly into the base of his neck, the Canine sucking at his flesh deliberately.

"Dean," he whined, fumbling for his mate's belt. "Could you do that somewhere else?"

"Sure," the Alpha chuckled, kissing his mouth slowly before returning to his neck. Only this time it was much higher, and even if Castiel had had a scarf he doubted it would have hidden the mark.

"I meant someplace less visible, not more!"

The Canine grinned, yanking Castiel's pants and underwear down his hips. "Then you shouldn't be so damn awesome. I won't let anyone get near you. You're mine, Cas."

"Yes, but- "

"No buts. Well, not that kind of 'but'."

So saying, Dean pulled him away from the door and tugged him over to the desk. The office as a whole was a bit cluttered, but half the desk surface was mostly clear. Meaning nothing got knocked off when the Canine pushed Castiel down, bending him over it and shoving his trench coat out of the way. The Feline bent over obligingly, grabbing the desk's opposite edge and shifting his tail out of the way. He heard a zipper drop as an index finger pushed inside him experimentally, moaning softly as it tugged at the slickened ring of muscle. He was turned on enough by this point he was already ready, enough for his hole to welcome the exploring digit and slick enough for it to slip easily inside him.

"Dean," he breathed, pushing back even as the Alpha pulled out.

Rather than respond, Dean pushed something else inside him. Castiel moaned, louder this time, bucking back into his mate's cock. The Alpha growled in response, gripping his hips and holding him steady. The Feline's eyes fluttered, but didn't close. They never left the back wall.

The windows didn't have blinds. The entire back wall was made up of painted metal and transparent glass. Castiel's eyes locked onto them, staring into a landscape half blue sky half Chemistry building. It was only three stories, but there was still the chance someone might see, might hear. It made these occasional romps all the more tantalizing. Castiel's own office only had a view of a parking deck, and the only time this had happened there the Canine had taken pleasure in fucking him against the window. It had been on an off day, there was no one to see, but there was always that chance.

One hand moved upward, gripping his shoulder while the other remained on the Feline's hip. His ears were flicked to either side in pleasure, a string of soft moans and gasps falling from his lips. Vaguely Castiel wondered if anyone would hear the noises he had no control over, the rhythmic smack of skin on skin, the low growl and occasional grunt from his mate. Then again, Dean would probably take it as a point of pride if anyone did hear.

His worries soon faded from thought, pushed down by pleasure, his mind focusing on the highly enjoyable sensation of getting fucked over a desk. His hands tightened on the desk's edge as Dean's pace became rougher, faster. The Alpha bent down, yanking his collar down to reach his neck. Castiel gave a soft cry as his mate bit the mate mark, the Canine's free hand gasping his own throbbing cock.

"Dean, Dean please," he gasped, breath harsh in his throat.

"Yeah, you like that babe?" the Alpha rasped in his ear.

A wordless whine was the only answer he got.

Dean's lips were curled in a smile as he nibbled the edge of one tender ear. "Sorry. You like that, Angel?"

"Yes mate." A quiver ran through him. Feline ears were even delicate than a Canine's. "Don't stop, please don't stop."

It wasn't that Castiel objected to the name, 'babe', particularly in this environment. He did protest it being too close to what Dean called his car. He wasn't sure why Dean's next favorite was 'Angel', but Castiel liked the tingle it gave him.

He cracked an eye when he felt his mate pull out, whining in protest. Dean didn't say anything, instead taking a step back to drag Castiel upright, laying him down again a moment later on his back. His pants were only down to his knees, but the Canine dealt with this by just pushing his legs up and out of the way. Castiel flailed for a moment as his knees were pressed to his chest, grabbing the shoulder of Dean's shirt in one hand and the edge of the desk in the other. Satisfied he wouldn't fall off anytime soon, he sat back to enjoy the ride.

"Dean, oh gods, don't- ah!"

Castiel clamped his mouth shut, wincing at the cry he'd uttered. He didn't dare open it again. Dean grinned, tangling his free hand in the Omega's hair and kissing him roughly. "Almost, Cas. Almost."

The Feline shuddered, tightening his grip. Dean wasn't the only one close to the edge. His head fell back, mouth open, feeling his muscles start to coil. Almost indeed.

Castiel had to free the hand clinging to the desk, clamping it over his mouth as he hit his climax. His back arched on the desk, the hand in Dean's shirt keeping the Canine close. As the initial wave began to ease, Dean shuddered, hitting his own orgasm. Castiel's head fell back, body going limp, eyes fluttering closed. He couldn't even find the will to protest as his mate came inside him.

Only when Dean was pulling out, his cock spent, did Castiel murmur, "I take it you went against my wishes?"

A hand pressed to his cheek, warm lips kissing him tenderly. "Aren't you glad I did?" the Alpha murmured.

"For once," Castiel hummed, slowly lowering his legs as Dean stepped away. He heard a drawer open, followed by a bit of rummaging as the Canine unearthed what he was looking for. He struggled to his feet, then obligingly bent over again as Dean turned around, butt plug in hand. His tail shifted to the side, curling around his mate's arm as it was gently pushed inside him. Castiel had been against keeping one here, for obvious reasons, but it had come in handy. Besides, it was a duplicate of his favorite one at home.

As he straightened Castiel asked, "Did you do that so I would have to go the rest of the day with your cum inside me?"

Dean pulled him flush, giving him a kiss that was slow and deep and lingering. "Maybe." One more kiss later he added, "And with my mark on your neck."

Castiel groaned. "I told you, not anywhere visible."

"Mmm, they're not too obvious."

Dean started for another kiss, but the Feline drew away, frowning. "'They'? There's more than one?"

"Maybe."

"I thought you were thanking me, not torturing me."

"You don't seem very tortured."

"That's not the point."

The Canine kissed his temple, nuzzling his ear, still flattened to the side. "What if I made dinner?"

Castiel considered that. "Depends on the dinner." His own skills were limited in that department, but Dean was deceptively good in the kitchen.

"Anything you want," the Canine offered, kissing him again. "Name it and it's yours, Cas." This time Castiel kissed him back, cracking a smile as he wrapped his arms around Dean's neck. "You're awesome, you know that?"

"You do have a tendency to remind me periodically."

Dean grinned, and was about to kiss him again when a knock on his door made them both jump. They shared a look of surprise before Dean cleared his throat, calling, "One minute!" as they fumbled to fix their clothes. "Damn it, they're early," he added under his breath.

Castiel hurriedly jammed most of his shirt back into his pants, synching his belt and yanking his trench coat into place, covering the evidence. When he looked up Dean had just finished adjusting his own clothes, making sure the Omega had done the same before reaching for the door. Castiel, feeling his face heat, sidestepped so he was half hidden behind his mate.

"Hey, sorry to bother you Mr. Winchester but I had a few questions about the homework."

Castiel grimaced. He should have known. An overeager pup. The student didn't even seem to notice that Dean wasn't alone.

"Uh, sure, come on in."

"Thanks! I...oh."

The young Canine had frozen just inside the doorway, eyes widening at the sight of a ruffled Castiel. "Mr. Novak. What are you doing here?"

"Leaving." He gave Dean's shoulder a squeeze as he sidestepped between the two Canines, smiling tightly as he ducked out. Only when he was riding the elevator back down did he relax, leaning against the walls as he hummed downward.

It was going to be well worth the time he'd spent tracking down the tickets and reservations. They'd have to take a week off in the middle of the semester, but unless they got a new class thrown at them it should work out fine just the same. While it had been Charlie who'd gotten him thinking, he hadn't expected to find anyone at any given Comic Con that might peek Dean's interest. Imagine his surprise when he found several Cons, as they were called, that boasted members of the Dr. Sexy cast. He'd found the nearest location to have Dr. Sexy himself, even managed to find a deal on tickets for an autograph. He'd been meaning to show Dean for a few days, but he'd kept forgetting, hence the need to tell him now. Dr. Sexy was his mate's guilty pleasure, and while he only found the show moderately entertaining himself, he knew Dean loved it.

The doors dinged open, and Castiel stepped through the double doors. Several things occurred to him halfway back through the Engineering building. One, it took conscious effort to walk normally. Two, he'd have to walk all the way across campus like this. No one would know what was inside him, but he sure did. Castiel thought about taking it out, stopping by a bathroom and fixing things, but then discarded the idea. It might be uncomfortable, but it would ensure some very satisfying play tonight. Besides, he had a more obvious problem to worry about. He turned up his trench coat collar, which was obvious enough for those who knew him, but even then it didn't cover much. Great. He disliked the thought of having to teach fifty plus students with blatant hickies on his neck, regardless of what his mate did to make up for them.

Castiel hoped for Dean's sake the Canine had a very good dinner planned. He was going to need it.

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