Chapter 5: Alpha!Vampire! Dean and Omega!Human! Castiel.

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Edited 1/15/23: Updated tags- Highschool AU. Omegaverse. Sex in school. Creampie. Butt plug. Mild D/S elements.

Third period had just ended when his pager went off. Castiel stopped halfway to the cafeteria, glancing down at the device attached to his belt. These days schools were one of the few places that still used the things, mostly because phones were heavily discouraged. A pair was given to a vampire and their donor at the beginning of each school year, so the latter could be summoned when needed.

Trying to ignore the looks he was getting, Castiel turned away from the cafeteria, heading towards the front office. It wasn't the first time Dean had done this during the school day, and whenever he did do it two times out of three it was for fun rather than necessity. The whole point of allowing vampires to feed during school was to allow for them to get what they needed when they might not be able to otherwise. Vampires were not only in the public eye these days, they were accepted and made up the upper class. If the vampire themselves weren't a member of the social elite they were close to or worked for someone who was. To be chosen as a donor was both an honor and somewhat scandalous. By vampire law you were untouchable, under the protection of the vampire who claimed you as their primary food source. A few, like Dean, took this a bit farther. They might be more durable, faster and stronger, but vampires were born, and they had normal if slightly extended lifespans. They took mates, and mated for life. Should that mate be human, it wasn't uncommon for that human to become their primary food source.

Both Castiel and Dean were seniors now. Castiel had been Dean's mate for two years, and had worn the black collar for three. A black bracelet symbolized you were a donor, but a black collar marked you as a donor with a relationship to the vampire that wasn't exactly platonic. Castiel had turned bright red when Dean had first given him the thing, but allowed the Alpha to secure it to his neck. Soft, pliable leather with a silver buckle and small lock, and Dean had the only key.

Castiel let himself into the main office, waving politely to the secretary and going through the door labeled 'Vampires and Donors Only'. Inside there were a series of rooms, each equipped with two chairs. One was normal enough, but the other wasn't unlike what you'd find in a doctor's office. There was also a small snack area at the end of the hall, so the donors could replenish whatever they needed afterwards.

The Omega glanced at the pager, read the flashing number, and went to room four. He let himself in, closing the door and dumping his backpack on the floor before turning on Dean. He blinked in surprise when he found that, rather than just his mate, someone else was also in the room. Dean was here, of course, but he was on his feet, hands jammed into his jacket pockets, looking uncomfortable. Sam, his younger brother, was leaning against one of the walls, head down.

"Hey Cas," his Alpha said, smiling sheepishly, scratching the back of his neck. "Look, uh, you don't have to if you don't want to. I was just wondering if you'd mind..." He gestured helplessly, glancing at his brother.

Castiel turned to Sam, studying at the younger vampire more carefully. He looked paler than usual, and he was pressing himself so hard against the wall the human worried he'd push himself through it. It didn't take a genius to figure out what Dean was asking. Once a claim was put down on a human, it remained until removed by one or both parties. There were legitimate laws protecting this claim, and while others were allowed to feed from the human with consent it was generally frowned upon. Still, this was Sam. He was four years Dean's junior, a freshmen, and got along quite well with his brother's mate. Castiel knew that the bond that ran between them was a lot stronger than brothers usually shared, and had accepted some time ago that it was sort of a package deal. You mated one, and you were guaranteed to be dealing with the other indefinitely.

Despite this, Dean had guarded his private stock jealously. Sam had only fed from him once before almost two years ago, and even then it was out of necessity. The younger Winchester had a bad habit of not being able to maintain a claim, platonic or otherwise. Half his blood intake was donated stuff, which was the vampiric equivalent of vegan food. The only time Castiel had agreed to let Sam drink from him was when Dean had found out his brother had gone a week without feeding, and he had about an hour before he was due to play a basketball game. It was either get him blood or Sam would have passed out on the court. At first it had gone well enough, but Castiel had noticed he was starting to feel lightheaded about the time he noticed Dean telling his brother to stop. In the end the Alpha had had to pry Sam away, and Castiel had woken up a few hours later cradled in his arms. Sam hadn't touched him since. The Omega had forgiven him, but he'd thought Dean had been the reason Sam hadn't drunk from him again.

Shrugging off his trench coat, tossing it over the counter, Castiel looked between the brothers. "I don't mind, if that's what you're worried about. Dean's not due for another feeding until Friday, so I have plenty."

Both visibly slumped in relief as he went over to the chair, hopping up onto it and scooting back.

His mate drifted over, hovering as Castiel laid back. "Thanks Cas."

"And I promise I won't take too much this time. It's just...since Ruby..."

Castiel waved it away, rolling up his left sleeve. Ruby had been his last girlfriend, and claim. They'd broken up a few weeks ago. "It's fine. Take what you need."

"Sam, go get some coffee would you? Two creams, no sugar, and a few of those cookies. And make sure they're chocolate chip, not raisin."

A frown creased Castiel's brow as Sam hurriedly stepped out, closing the door behind him. Dean braced on knee on the chair's edge, levering himself up and bracing a hand on either side of the Omega's head. "What are you- "

His question was cut off in a kiss, a deep, lingering, thorough one. The human gasped when they parted, bracing a hand against Dean's shoulder to forestall another so he could demand, "What are you doing?"

"I told you about oxytocin and vasopressin before, right?" grinned Dean, dipping down to press his nose under the Omega's jaw. "What they do to your blood."

Heat rushed to Castiel's face. "Y-Y-Yes, but not here! Sam will- "

"Will not come back in until I tell him," murmured Dean. He pressed a kiss near the corner of his mouth, then hovered just above his mate's lips. Despite himself, Castiel found himself arching up a little, earning a grin even as Dean pulled back.

"It won't be the first time we've done it here, Cas," the Alpha reminded him, resting their foreheads together. "You like it as much as I do. You can't tell me you don't."

Castiel hesitated. It was their favorite feeding method, Dean drinking his blood either during or after sex. It helped that vampire saliva already had a euphoric effect as well as a healing one, originally meant to immobilize their dinner. These days it just ensured humans quite enjoyed being claimed. As for doing it during school...yes okay he enjoyed it too. It added an extra kink.

The next time Dean kissed him, he caved immediately. A pleased rumble thrummed in his throat, his weight shifted so one hand was freed to fix the clothes problem. Fingers undid the Omega's belt and pants with practiced ease before moving to the Alpha's jeans. Castiel bucked into the touch, one hand reaching up to grip his mate's shoulder while the other ran through his hair.

The human was vaguely aware that Dean's fangs had dropped, whimpering softly as the sharp incisors pressed against his mouth. He clung to his mate as the vampire pushed his pants down his legs, then hooked a hand under one thigh to hitch his hips up. Dean slid a hand under his shirt, fingers brushing up his ribs before bracing over his left pectoral.

"Ain't gonna feed from you this time Cas," he murmured, voice husky with lust. "Still gonna make you cum, gonna make you scream. You taste awesome after a climax, Angel." He caught the Omega's lip between his teeth, making his breath hitch. "Taste even better if you cum on my cock. Can you do that for me? Be good and cum with me inside you? Make your blood sweet?"

Castiel opened his mouth to answer, but all that came out was a gasp as fingers wrapped around his cock. He moaned as Dean stroked him, then whimpered when a finger pad brushed the slit. A part of him noticed the Alpha shifting their positions, but barely. Certainly not enough to care. He stayed relaxed, returning each thorough kiss, shivering when he felt his mate's cock brush his dripping pucker.

"Want it, Angel?" Dean rasped, nipping and suckling just above his pulsing jugular. "Wanna be good for me? Want my cock inside you?"

"Y-Y-Yes, please Dean, please I- "

Castiel's head fell back, his back arching on the chair as his mate slid into him. Not for the first time he was grateful the thing was in a lounging position, at a 140 degree angle from the main seat. He clamped his mouth shut, breath shuddering in his chest. Dean kissed him roughly, bracing a hand on his hip to keep him steady. He drew himself out and slid back in, maintaining an oddly slow pace. Castiel might have questioned it, as Dean was more of a hard and fast type if they were doing it in a place like this, but there was still a hand wrapped around his cock. He was getting hit from two sides, three if you counted the hungry mouth still devouring his own. Considering they'd made love just last night, Castiel found himself drawing close to the edge remarkably quickly.

"Dean," he breathed, eyes hazy. "Dean, Dean please. Don't stop, don't stop, please don't stop."

The Alpha chuckled roughly, letting his fangs graze his jaw. "That's it, let me take care of you. Gonna be a good Omega and cum on your mate's cock? Gonna say my name when you climax?"

All the human could manage was a wordless, desperate sound. He was a little preoccupied when he was inches away from an orgasm. Still, Castiel heard him. Dean had gone from slow to fast, the hand on his hips the only thing keeping the Omega from sliding up the chair with every thrust. Castiel wished his legs weren't hampered by pants and underwear, wished he could use them to cling to his mate as well as his hands.

"Oh gods," he gasped, eyes starting to roll back. "I'm...I...Dean."

Castiel locked onto green eyes with pupils so blown out he could barely see the actual green. A shudder wracked his body, a wave of intense pleasure crashing through him. Still he held that gaze, hands biting into his mate's shoulders, chest heaving. Better still, Dean didn't stop. By the time Castiel's hands fell away, the rigidness as he reached his climax seeping from him, the Alpha was giving it a final thrust. A tiny whimper left the Omega's lips as he felt his mate cum inside him, realizing Dean intended for him to go the rest of the day like that.

Still catching his breath, Dean pulled out and stumbled to his feet. Not bothering to fix his pants just yet, he staggered over to his backpack. When he came back a minute later, Castiel didn't need to see what he'd gotten. He obligingly braced his feet on the paper covered plastic, lifting his hips a little. Dean pecked his lips, stroking his hair with one hand while the other slid a plug inside his hole, keeping cum inside him. Castiel shivered, wishing the stainless steel wasn't quite so cold.

The Alpha puttered about with quick, practiced movements, cleaning them both up and fixing their clothes. He moved Castiel to the other chair so he could get rid of the messy paper and replace it with fresh stuff, then pulled the Omega into his lap, nuzzling the mate mark on his throat. Castiel rested his head on the vampire's shoulder, eyes half open, still thoroughly relaxed from the orgasm. His inner Omega purred at the sensation of having the butt plug inside him, even if it was a smaller one easier to smuggle in a backpack, at knowing their mate's seed was inside them. A combination of the strongest heat suppressants and birth control they could lay hands on insured unplanned pregnancy wouldn't be an issue, meaning he got to enjoy this more often than he otherwise might.

The human was all but purring when Dean called Sam in. The younger vampire's cheeks were a bit pink as he came in, shutting the door behind himself. He set a cup of steaming coffee and a napkin of cookies on the counter, pulling the chair over. Castiel's sleeve was still rolled up, and the human offered him his arm absently.

His eyes fluttered as Sam's fangs gently made a cut on the soft flesh of his inner arm, licking the wound to get his saliva in the bloodstream before he latched on. A soft sigh left Castiel's lips, and he closed his eyes, enjoying the sensation. A callused hand stroked his hair, warm lips pressing to his jaw.

This time Sam didn't take too much. He pulled away before Castiel was even lightheaded. The Omega's eyes flickered open as the younger vampire drew away, licking the wound to seal it. Within an hour the saliva would have healed it completely, not a mark would be left.

"Thanks Cas."

Castiel hummed absently, quite happy where he was.

"You'd better get going. He'll be out of it for a little while."

"Will he be able to get to class?"

"Yeah, but this'll take up the whole lunch period. It's half over already."

Castiel heard Sam leave, yawning drowsily. "Do I have time for a nap?"

"Why would you want to do that?"

Before the Omega could ask, he caught his breath as his mate nudged the plug's base through his pants.

"If you do anymore I won't be able to go to class," Castiel protested, struggling to sit up.

"So?"

The human managed to lurch to his feet, taking a step back and folding his arms. "You might not mind ditching, Dean, but I do."

The Alpha grinned, but let it go. He made Castiel sit back down so he could get some sugar and caffeine into his system, but didn't push for round two. Not yet, anyway. Before Castiel left the Alpha pulled him into a marrow-melting kiss, only to follow it with a whispered, "When we get home, you're going to go straight upstairs and present. Clear?"

Castiel shivered, not daring to meet the Alphas eyes lest he give in then and there. "Yes Alpha."

With one more thorough kiss, just to show him who was Alpha, Dean let him go.

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