SUMMARY: Out on patrol while on an internship with the Endeavour agency, Alpha instincts screaming at him, Katsuki Bakugo is ambushed alongside Izuku Midoriya and Shoto Todoroki, but the attackers only have eyes for the brash teen with an explosion Quirk.
Overpowered, Katsuki wakes up in a plush cell and instantly discovers he's not alone.
He's been locked up with an Omega and one who's in Heat.
The Omega Atem has been in captivity for eight years and his masters desire one thing-a child with a powerful Quirk and they will try anything to get it.
If anyone had told Katsuki Bakugo he'd end up collaborating with the nerd Deku, he would have told the Extra stupid enough to think so he had rot for brains and yet here he was, in an internship alongside Deku and the icy-hot bastard at Endeavour's agency and working the streets.
Endeavour had deemed them able to patrol without a Pro up their asses and though Katsuki was A-OK with that decision, his instincts were screaming at him since they had started their shift.
As well as a Hero in training, Katsuki possessed a secondary gender, just as did almost sixty-five percent of the global population.
When Quirks first started appearing, so too did a gene that led to Alpha and Omega, with those not possessing the gene being referred to as Beta.
Alphas were naturally stronger, had enhanced senses and stamina. With similarities to wolves, such as retractable canines, a knot at the base of their penis and even ruts, they were considered extremely protective in regards what was theirs—particularly their mates and pups. Alphas could be either male or female, though it numbered higher in males and had long since become the Dominants of the human race, even among the Quirkless. Having fierce and aggressive personalities, Alphas were only ever docile around their mate.
Omegas tended to be much smaller than their Alpha counterparts—though not always. Leanly built, with curved hips and in the case of male omegas, softer in the chest and possessing a uterus. Also similar to wolves, Omegas had a heat cycle that occurred every three months and though there were plenty of female Omegas, male Omegas were extremely rare.
Katsuki was an Alpha, a fact he relished in and yet at times was a pain in the ass. Like tonight, when his senses were going absolutely haywire.
"Kacchan…are you okay?"
Naturally, the damn nerd had noticed. As much as it pained Katsuki to admit it, he was pretty fucking observant and tended not to miss a thing. "I'm fine, Deku. Just itchy in my skin…fucking Alpha instincts are crazy alert."
"Mine aren't," Shoto commented from his left. "Are you sure you're not near your rut?"
"Todoroki!" Izuku squawked, looking up at the Alpha, the Omega completely mortified. "You can't just ask someone something that personal!"
"No, I'm not you half 'n' half bastard!" Katsuki barked. "I just…Somethings wrong, okay?!"
Katsuki couldn't explain it. Doctors could never understand it either, but his Alpha instincts tended to just simmer closer toward the surface and because of it, it was always stronger than other Alphas.
Right now, everything was screaming at him to grab up Deku and haul ass back to the Endeavour agency, which the nerd would no doubt kick the shit out of him for, because he may have been an Omega, but he wasn't about to be a damsel in distress.
Something licking over his heightened senses, Katsuki stopped, lifting his fist to signal the other two. They were on a darker street, one with little foot traffic this time of night and yet, someone was here that was a threat.
"Icy hot, call it in."
"Call what in?" Shoto demanded confused. "There's nothing here!"
"Damn it! Just do it!"
"Bakugo!"
They came at them from out of nowhere. Moving like smoke, possibly from a Quirk and the three barely had a second before they were engaged in a fight.
Swearing colourfully, Katsuki leaped out of range, his Quirk blasting him airborne. But he was barely up, before something collided with him and brought him crashing back down. Bones rattled, he coughed violently, the wind knocked out of him. Rolling onto his back, he just about dodged another blow and still he couldn't see the attackers. That same smoke creating a shield about them.
"Cowardly bastards!" Katsuki raged. Red eyes darting about, he realised to his horror, he couldn't see Izuku or Shoto either. He was surrounded on all sides by smoke!
Another swipe, Katsuki fell to his knees with a curse. His gloved hands lit up, but he held back on using his Quirk. He was just as likely to hit his teammates as he was these bastards. "Deku! Icy Hot!" Nothing. In fact, he couldn't hear a damn thing! Everything in him screamed to retreat, instincts in uproar and then something hit the back of his head and it was lights out.
xxx
Coming too was a bitch. Head thumping forcefully and when he opened his eyes, Katsuki only ended up blinded by a bright light. "Fuck!" Throat feeling like he swallowed glass, he pushed up into a sitting position and realised he wasn't alone.
On a large bed, almost lost within a nest of blankets and soft plushies was an Omega. He had to be Katsuki's age and he was the tiniest male Omega Katsuki had ever seen. Smaller even then Deku.
His skin was a lovely pale gold, blonde, black, and red hair spilling about him in messy strands and his eyes were stunning. A solid blood red iris, completely lacking a pupil, sat against a black sclera and he could have sworn the red pulsed like a crimson flame.
Moving, Katsuki looked down and scowled at the heavy piece of metal wrapped about his wrist. "What the crap?!"
"It's a Quirk inhibitor," The Omega said softly, lifting his left arm to show off one of his own. "It keeps us controlled."
"For what?!"
Panic was beginning to set in. Scrambling up, still a little shaky, Katsuki noticed to his horror he'd been stripped of his gear and dressed in a comfortable pair of sweatpants and long sleeved tee. The Omega wore the same, so it was obviously the uniform of wherever the hell they were.
Red eyes latching onto the only door, Katsuki noted the high tech lock and cursed. There were cameras too, so the rat bastards were watching them!
"Damn it! What the crap is this?!"
The Omega watched him calmly, head tilting until his hair fell to one side and small delicate golden hoops shimmered in his ear. "They haven't told you?"
"Do I look like I know what the hell is going on?!" Katsuki bellowed. "My ass was unconscious only five minutes ago!"
"I'm used to the Alphas already knowing before they're locked in here with me," the Omega responded with a shrug. "My name is Atem by the way. What's yours?"
Small talk? They were locked up in a cell, their Quirks blocked, and this strange Omega wanted to engage in small talk?! They should have been figuring out a way to get free! "That's what your weird self cares about, my name?"
Atem sighed and climbed from his bed, stretching his limbs, locking his gaze on Katsuki and suddenly they seemed so much sadder and worn down. "Truthfully, I don't much care, but they've already given me that damnable drug to kickstart my heat, which will in turn draw out your rut and if I decide to let you near me…which in two years I haven't with any poor bastard of an Alpha, then these monsters may just finally get what they want. Might as well get to know you before they drag you off to be killed for being yet another failed attempt."
Katsuki's heart pounded in his chest, the sixteen year old sure he was about to vomit. "Attempt…Attempt at what?" Don't say it, sweet hell don't say it!
Atem snorted irritably. "At a pup. They want you to breed me."
xxx
"What do you mean you can't find him?" Izuku demanded, wiggling away from the searching hands of the paramedics, eyes locked on Endeavour. "You had us wear those trackers, or his cell phone…Kacchan can't be just gone!"
"It's all been disconnected," Endeavour responded, pinching the bridge of his nose in frustration. "I've patrols out everywhere…We're calling in other agencies…We'll find him."
"Why take him?" Shoto asked, more to himself than anyone. "There was three of us, but from the minute they attacked it was clear they had a specific target. They wanted Bakugo."
"Could it be the league of Villains trying again?" Izuku voiced aloud, feeling sick at the very idea. Jumping when his phone rang, he pulled it out and hurried away for privacy. "All might?"
"Young Midoriya! Thank goodness you're all right. I just got word."
Heart thudding, tears welling, Izuku cursed the Omega side of him that tended to make him ridiculously weepy. "I was right there, All Might and I…I couldn't get to him."
"Don't do that young man!" His teacher scolded gently. "You can't control the outcome of everything that happens, and you and young Todoroki did the best you could. Now, we just need to regroup and find young Bakugo."
Sniffling, Izuku conceded to All Might's logic. He knew he was right and that this wasn't over.
Hanging up, Toshinori sagged back and let the relief wash over him. His heart ached for the missing Bakugo, but if he lost Izuku, it would surely kill him. In the time he had come to know the boy, his traitorous Omega brain had formed a parental like bond and after his first loss…well…he couldn't take another.
Dragging himself up. His body aching a bit more than usual, Toshinori rooted in his pocket for the one thing he never went anywhere without.
It was a Polaroid picture taken eight years ago. Before All For One destroyed his body, a time where he was truly happy.
In it, he sat grinning, a giggling boy of eight on his lap with his hands outstretched and creating bunny shaped black flames with Ruby red eyes. Messy red, black, and blonde hair framed his happy little face and as always Toshinori crumbled, because only days after the photo was taken his sweet boy had vanished from his bed never to be seen again.
Eventually he was pronounced dead and Toshinori had to get on with life.
Part of him still hoped. But even that was beginning to wear thin.
His son was never coming home.
xxx
At some point after that bombshell, Katsuki's brain had shorted out because the next he realised the Omega...Atem...was writhing and whimpering on his bed.
He wasn't fairing much better. He could already feel Atem's pheromones drawing out his rut. He was hard as nails beneath the lose sweatpants and his canines itched fiercely.
What had Atem said? He had rejected any Alpha they had put in with him over two years. Such a thing wasn't unheard of. Despite Beta bullshit trying to claim Omegas would just accept any cock during their heat, it actually wasn't true, and Omegas would fiercely attack if any unwanted advances were given by an Alpha and Alphas very rarely could overcome the rejection to even take an unwilling Omega, because their pheromones would change to warn them off.
Shaking his clogged head, Katsuki flinched at a particularly loud keen of pain. Damn the bastards! No way he was out of it for more than a few minutes, so whatever they gave Atem had jumped right over preheat and straight into the middle of the main event.
Instincts warring with common sense, he knew his rut would soon place a haze over his mind as his baser desires took over and as fucked up as it sounded even to his mind, if he was trapped, he wanted to be sure of Atem's consent while they were still fairly lucid.
Skin driving him crazy, Katsuki reached for the hem of his tee and yanked it off. The sweatpants could wait. For now, he wanted to see if Atem would be receptive.
One step and that tri coloured head immediately snapped up, red on black eyes latching on Katsuki. The Alpha had enough sense to stop and let the Omega come to him.
On shaky legs, Atem scrambled from his nest. The fog of his heat was clawing at the edges of his thoughts, so he recognised the brand new Alpha who had been tossed into this hell alongside him.
But would his Omega accept him?
Panting, his body throbbing, he stumbled toward the boy. The Alpha obviously knew enough not to move and when he reached him, he bent his taller form to allow Atem to take a whiff of his scent. Having always been on the tiny side, he was grateful.
As he had done so many times before, Atem buried his nose into the crook of his neck and drank him in.
The aroma hit him like a slap. Sunlight, the Alpha smelled of warm sunlight with earth and a hint of ozone and his Omega melted instantly to butter.
"Alpha," he whined, his pheromones exploding fiercely about them.
Katsuki was on him in a second. His mouth finding Atem's, that scent leaving him drunk.
Mine!
His Alpha was fully to the surface, hungry and ready to mate. "Katsuki..." He choked out between kisses. "My name...is Katsuki."
Grabbing Atem by his thighs, he carried him to his nest. Their combined heat and rut had fully taken over and all they cared about was accessing as much skin as possible.
"Hurts," Atem whined helplessly, spine arching with a fresh wave of heat.
"I know, baby," Katsuki rumbled against his throat, the endearment spilling free by accident. "I got you."
The haze was taking over quickly, and Atem was clearly in too much pain for finesse. Before his Alpha could make a brute of him, Katsuki ripped away Atem's clothing, his sweatpants following and spread the boy's legs wide.
"Fuuuuck..."
Oh yessss! The Omega was so ready for him, slick pouring from his swollen hole. Positioning his rigid cock, Katsuki pushed and groaned when Atem's body gave way instantly, allowing him to sink balls deep.
With a keening wail, Atem bowed back, hands fitting the soft blankets beneath him.
Kissing him hard, Katsuki began thrusting his hips. Just giving in to what his body craved. To what Atem's was demanding.
Breed Omega! Bond Omega! Mine, mine, MINE!
The muddled words tumbled about his head and Katsuki gasped when his swelling knot began to catch.
Almost...almost...and finally with an audible pop, his knot pushed past Atem's pulsing rim, ripping an orgasm from both Omega and Alpha, tying them together. By sheer force of will, Katsuki wrestled his Alpha back and refused to give into the urge to biting Atem's mating gland.
With the first wave dissipating, clarity returned and with it the gravity of the situation.
Atem gave in to his tears, body shuddering and Katsuki's welled as he gathered the Omega against him.
"Damn it!" He ground out, using his scent to soothe the smaller boy. "I'll get us out of here...I promise!"
But promises were nothing but forgotten paper dreams.