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“You really wanna risk it?” The yellow-haired handler’s eyes were wide as he spoke in a loud whisper, clearly trying not to wake the hybrids sleeping in the kennels only steps away.
“They’re more sensitive than alphas, Denki.” Kirishima, another worker, explained. Izuku watched as the redhead nervously rubbed the back of his neck with one hand. “His estrus will be easier on him if he can smell an alpha nearby.”
That was unusual—this was an alpha hybrid rescue, accepting both owner turn-ins and abandoned pets. In his years here, Izuku had never so much as caught a whiff of another secondary gender–only the human workers and prospective owners. On occasion, a familiar rotation of fosters would shuffle through to pick up a lucky alpha. And once in a blue moon, the fosters grew fond of their pet and adopted them for real. Izuku hoped to be so lucky.
Izuku had always known he was different–he had no history of aggression, no territorial behavior. His body produced a high concentration of alpha pheromones too. But none of that mattered, because prospective owners wanted an alpha , a hybrid with the instincts to guard their home from intruders, or the drive to breed their omega pets. Izuku knew that functionally, he was too submissive, too gentle for that role.
That didn’t stop him from daydreaming about falling in love, though. He heard that omegas were graceful, subdued creatures, elegant in their own right. That they smelled like spring clovers, or even better, peanut butter. He read about omega characters who were even touchier than him, nurturing their alphas and cuddling up to their masters—so of course his true love would be like that too.
A dog could hope.
“But Izuku’s kennel–” Denki protested, eyes flitting over to the alpha but not catching him awake. The shadow of his bookcase just barely disguised the perk of the hybrid’s fluffy ears at the mention of his name.
Kirishima placed a comforting hand on the other worker’s shoulder, much cheerier than anyone else would be, given the time. “Don’t worry about it, you know how he is.” The redhead yawned, motioning for Denki to follow him into an adjacent room.
Izuku felt himself succumbing to his own sleepiness, curling his fluffy green tail around himself and allowing his eyes to fall shut in the comfort of his bed.
*****
“Mmmh,” Izuku groaned, button nose twitching as he slept. His mind had conjured the most delicious smell, warm like Christmas treats. It was stronger than the scents of the other alphas, sweeter even. He couldn’t stop his body’s instinctive reaction, his mouth watering and hips jerking as blood rushed to his growing interest.
It wasn’t until desperate whimpers broke through the haze of sleep that Izuku realized that he wasn’t dreaming at all–something was going on in the previously-unoccupied kennel next to his own. Izuku’s alpha was reacting in a way he had never felt, stumbling toward the other hybrid as if pulled by a magnet.
The wobbly latch on the door between his kennel and the omega’s opened easily, and he was greeted by a tantalizing sight.
There, in a nest of donated blankets and fluffy pillows, was the most gorgeous omega Izuku had ever laid eyes on. Like Izuku, he was a dog hybrid, albeit a smaller breed than the alpha. If his spiky blonde hair and angry eyes were any indication, this spunky little thing was a pomeranian.
Cute.
Approaching slowly to avoid startling the other hybrid, Izuku watched as the omega pleasured himself, his puffy pink folds parted by one clawed hand as the other furiously rubbed at his swollen clit. The omega’s face was scrunched up in concentration, seemingly unbothered by the slick that spilled over his inner thighs as his small cock bobbed with each movement.
He looked good enough to eat. His hair was damp and his body glistening with sweat–he must have been exerting himself for quite some time before Izuku’s alpha caught on.
The amount of self-restraint Izuku had to exert was palpable, his alpha urging him to hold the other hybrid down and fuck him straight through the nest. Instead, he stood in the doorway and bit his lip as he stroked his own length, smearing precum from the leaking slit to help the glide of his hand.
Izuku didn’t realize how lost in his own world he was until a low growl brought him back to his senses. The omega’s actions had halted as he glared at Izuku with distaste, his ears folded back against his head. “Who the f–ah,” the omega grit out, unable to stop a whimper from escaping his lips. “Who are you?”
Releasing his grip on his own cock, Izuku stepped toward the other hybrid. “My name is Izuku.” he said, his comforting pheromones drowning out the bitter odor of distressed omega. “I’m here to help.”
“Fuck,” the omega cursed as a fresh burst of slick dripping onto the nest below him.
Settling in next to him, Izuku reached up to brush damp bangs away from his partner’s face. “What’s your name?” he asked, his hand migrating to the other hybrid’s chest. The omega moaned.
“Ah, it’s–Shit. It’s Katsuki.”
Drowning in the pleasant smell of ginger and nutmeg, Izuku barely caught the name. “I’m gonna take care of you, okay, Kacchan?” he asked, leaning down to capture the omega’s mouth with his own. Kissing him deeply, he rolled a pert nipple between his thumb and forefinger, delighting in the way Kacchan hummed against his lips.
Before long, the omega needed more. “Alpha, please,” he begged, flipping onto his front and swishing his tail to one side to expose his sex. Izuku’s alpha preened at the sight of it, flushed and dripping for him, just waiting to be stuffed. Experimentally, he slipped one finger inside the omega, smiling fondly at the way he clenched around the intrusion, his tiny cock leaking at the tip.
“I’m too big for you, Kacchan,” Izuku cautioned, kissing his shoulder and pressing a second finger into that tight heat. The smaller hybrid was filled just from that, but he continued to thrust back onto his fingers and moan for more.
“Shh,” Izuku cooed, “Gotta open you up.”
The sentiment was met with a growl. This omega was entirely different from what Izuku had expected, aggressive and self-assured as though he were an alpha. Even his scent was unique, spicy rather than floral.
He was going to take his time stretching Kacchan, but the impatient omega was insistent that he be stuffed full of Izuku’s knot, and his alpha was more than happy to comply.
He slipped his fingers from the omega’s pussy, lining his length up with the entrance. Slowly, the alpha pressed inward, until his cockhead was fully engulfed in Kacchan’s warmth. It was all he could do not to come on the spot. “Shit,” Izuku breathed, slowing to give the other a chance to get used to the stretch.
But Kacchan had other plans, thrusting back onto the alpha’s cock, sheathing the full length inside him with one roll of his plush hips. “Ah!” Izuku exclaimed, overwhelmed by the feeling of the other hybrid around his cock. “I’m gonna come if you keep that up.”
Kacchan bared his teeth, his little omega fangs more menacing than they would be, had they belonged to anyone else. “What kind of useless alpha can’t even–ah–fuck an omega right?”
Fine, if Kacchan liked it rough, Izuku would indulge him. The alpha landed an open-palmed smack against the omega’s ass, watching as it jiggled. “You wanna be bred?” he asked, pulling out just far enough that only the head of his cock remained inside, before slamming back in with a wet slap. “Want me to fill you up, give you my knot?”
“Fuck,” the omega keened, meeting Izuku thrust for thrust. The alpha wrapped his hand around Kacchan’s small length, pumping once, then a second time, before the omega came across his palm. The alpha was insistent on milking every last drop, stroking him through it before shifting lower to caress his clit. “You’re gonna be so beautiful, kacchan. So fat with our pups,” Izuku praised.
“Mmmh, alpha!” Kacchan whined as his alpha’s knot caught on his entrance before locking inside him. Izuku’s hips stuttered as he spilled rope after rope of cum into the omega’s tight heat, his fingers rubbing circles into his clit. Before long, Kacchan was coming too, his tiny cock twitching as he painted the nest beneath them with his seed.
Afterwards, Izuku shifted their position so they could lie next to each other. “Do you still want me to mark you?” he whispered, running his fingers through the now-subdued omega’s hair.
Kacchan looked up at him with tired eyes, clearly as affected by the cocktail of pheromones in the air as Izuku was. “You weren’t planning’ to hit it and quit it were you, Deku?” he asked, his ears perking up in anticipation.
Izuku furrowed his brow. “Deku?”
The omega smirked, his tail swishing happily. “Because you’re useless.”
“Hey!” Izuku protested, his cheeks flushing red.
“But,” Kacchan continued, poking him in the forehead, “You’re also mine. Now quit lazing around and mark me already, dumbass.”
*****
4 months later
“Do any of them like to read?” Shoto asked, surveying the kennels before him, where alpha hybrids went about their daily tasks. “I own a small bookstore and it would be nice to have some help, or at least, someone to talk to.”
Denki’s thought for a moment. “Well, we do have one omega, but–”
“Great, I’d like to meet him.” Shoto said.
And so Denki nervously led him down a hallway, stopping before a particularly large kennel. Inside, an alpha hybrid about Shoto’s size was reclined in an intricate nest, his arm around a very pregnant omega pomeranian. The smaller hybrid was kind of cute actually, his ears laid back against his head as he shot him a deadly glare. “The hell do you want, candy cane?”
Shoto cocked his head. “Me?”
The alpha was quick to apologize for his feisty mate, but there was no need–Shoto had already made his decision. “I’d like to take them home with me,” he said, turning to Denki.
The worker grinned excitedly. “Oh yay, did you hear that, Kacchan? This nice man is going to take care of you and your cute little pups! What do you say?”
“Don’t call me–” the omega growled, but was quickly interrupted by his mate.
“We would love to,” The freckled alpha confirmed, beaming up at him.
Shoto couldn’t help but smile back.