In a world that surrendered to the super humans with the most powerful quirks, it didn't come as a surprise that secondary genders played another important role in status. Pro heroes consisted only of the strongest alphas, and sometimes betas, but never an omega.
Omegas we're troublesome, they were submissive, they would just endanger the lives of other heroes. Omegas were categorized with the quirkless. They were never meant to be heroes.
Which was why no one suspected that Pro Hero Deku, an omega, would climb his way to the top of the charts. Followed closely behind by his alpha mate, Dynamight. The very first collared pro hero alpha. While Dynamight could very well force Deku into submission, he never did.
Not like Izuku would ever let him, that is.
Izuku leaned back in his favorite love chair, watching his mate with half-lidded eyes. The sight of the alpha in front of him was stunning, and it never ceased to take his breath away.
Katsuki was positioned in just the way Izuku liked him, his wrists tied to the bedpost with silky, but sturdy, ribbon making his defined muscles bulge even more. His legs were spread wide open, giving Izuku the most beautiful view of this fully erect and throbbing cock, along with the vibrator that made Katsuki make the cutest moans and whimpers.
But the best part was the pretty little collar that Izuku picked out that was tightened around his neck. Specially designed to rub against his scent glands, to make him more aroused.
Twirling the remote control between his fingers, Izuku dialed it up a notch, making Katsuki gasp and buck his hips forward. Tsking in disapproval at Katsuki's movement, Izuku pressed another button. It was specifically made to give a small shock to the prostate as punishment, not enough to hurt but enough to remind the alpha that he misbehaved.
A whine rose from Katsuki's throat from the feeling, but he stilled after that. Izuku hummed in approval and set the vibrator up another notch. He placed it on the table beside him, and instead used his fingers to start to message his folds.
He wasn't in heat, so he would have to help himself produce slick if he were to be able to take Katsuki inside him. He fingered himself lazily, spreading his legs in a way that Katsuki could get a good view from where he was, and began making a show of inserting all five fingers in, rocking into his fist, covering it with slick.
A string of drool fell from Katsuki's mouth, and his cock throbbed in a way that must have been painful, precum already starting to leak from the tip. He looked gorgeous flushed and debouched, waiting for his omega to use him in any way he seemed fit.
Izuku sighed, deciding he put his sweet alpha through enough foreplay, and made his way over to the bed. He went to work taking out the vibrator that was fit in snuggly and threw it to the side. Katsuki's body relaxed, his hole red and swollen.
"You did such a good job, puppy," he praised, sweetly. "So good in fact, I'll let you choose the next step! Fingers or tongue?"
"Ha-f-fingers," Katsuki gasped out, "I-I want your fingers."
Izuku beamed at the choice. "Anything for you, puppy," he said, slipping a finger into tight hole, stretching it a bit before adding in two more. Katsuki whined at the intrusion, and rolled his hips against Izuku's hand, as he began to start a slow pace, hitting Katsuki's prostate each time.
While he began scissoring the alpha, his other hand reached up to give attention to Katsuki's erection. He began to jerk him off at a steady pace, thumb swiping over the head every once and while. Katsuki's body wavered between wanting to thrust down into Izuku's fingers or into his hand, and he gave out a pained whine, the need to orgasm becoming painful.
"Deku, please, I can't-ah!"
Izuku squeezed his cock tightly as well as dug his nails into the soft tissue of his hole, making Katsuki gasp in pain.
"Did I say you could talk, alpha?" Izuku growled, getting annoyed at his mate's attempts at rebellion. He gave his cock another couple of harsh thrusts, when he received no answer. "Well?"
A purely alpha growl escaped Katsuki as he threw back his head in frustration. He needed release soon or didn't know how much longer he could continue. "I-I need to come, I can't- oh god!"
Izuku bit the inside of his thigh harshly, his fingering growing rougher. "You'll come when I say you can," he said, licking the blood from the bite. Katsuki growled again, the sound making the slick run down his thighs in rivets.
He was ready for his alpha.
Pulling out from Katsuki, he climbed on top of him, pushing the sweaty blonde hair away from his forehead, planting a kiss on it. Katsuki's eyes were clouded with lust, his face red, and breathes coming out raggedly. Izuku's inner omega preened, ready to take his alpha's knot.
Without warning his mate, he dropped himself down on the alpha's dick, and threw his head back at the full filling. Katsuki's whines and gasps grew more and more desperate as Izuku rode him, digging his fingers into his hips so he couldn't thrust back up.
"Fuck, fuck, fuck, more! Move faster!" He cried out, starting to pull at his restraints. Izuku nipped his ear. "You're not in charge here, alpha," he said, punctuating each word with a bounce. "You're nothing but my little alpha slut, isn't that, right? You like being dominated by an omega, don't you?"
"Yes, yes, fuck me, omega! I'm yours to enjoy whenever you please, your alpha slut," Katsuki babbled on, tears starting to prick at the edges of his eyes. Izuku shivered in delight at seeing his alpha come undone. He was the only one who could bring the great Bakugo Katsuki to his knees.
He grabbed Katsuki's collar and ripped it off, exposing his inflamed scent glands. Izuku licked his lips and began biting the tender flesh of his neck, sucking darker spots into places that wouldn't be covered by Katsuki's shirt. He came back up to the scent gland and kissed it lovingly, the bonding mark on the same spot as Izuku's.
Teasing at the thin skin with his fangs, Izuku rolled his hips earning him another choked moan from below him. Katsuki was deep inside him now, and he was able to see the bulge in belly from his alpha's soon to be knot. Fuck, it made him want to release Katsuki right then and there.
He picked himself up and dropped himself done again, making Katsuki let out a string of curses as he leaned close in his ear. "Do you want me to mark you again, puppy? Do you want everyone to know that you're a little whore for your omega."
Katsuki nodded feverishly, looking on the brink of collapse. Izuku grinned, his omegan fangs flashing for a moment.
"Verbally, Kacchan, you little alpha slut. Tell me where an alpha's place is!"
"With his omega!" Katsuki howled out. "With my omega, my knot inside him whenever he pleases!"
Izuku growled in approval, biting over the bonding mark. Katsuki moaned loudly, now allowing tears of ecstasy to drip down his face. The omega lapped at the blood, giving a small kiss. He reached up to Katsuki's restraints and started to untie them.
"Now, puppy, whenever I'm done untying you, I want you to fuck me hard and fast. I want you to make me scream. I want you to knot me like you've never done before and stay inside of me for however long I want. Can you do that for me, my little alpha slut?"
Katsuki growled threateningly as the last rope came undone, and immediately tackled Izuku to the carpet, pressing his face into the ground as he pulls out and slams back in as hard as possible.
Izuku cries out, head thrown back against the alpha's chest. He clawed against the carpet at each harsh thrust. Pleasure spiked up his body and his inner omega keened at the treatment.
Katsuki's harsh breath sounded in his ear as he continued to ram into him, slick dripping down his legs. "Is this what you wanted, little omega? You wanted my knot so deep inside you, you can't move," he said, picking up speed.
Pleasure courses through the omega's body, the rush of their orgasms coming upon them. "Yes, knot me, alpha!" He moaned. "Knot me like the good little alpha slut you are! Only you know how to please your omega, alpha! Alpha!"
The words send Katsuki over the edge, and he bites over the omega's bonding mark as they come together, his knot firmly in place.
The collapse to the floor breathing heavily, both letting out small moans and whimpers from leftover waves of pleasure, laying silently for a long enough for Katsuki's knot to deflate. Izuku looked over to Katsuki and smiled softly, cupping his cheek gently.
"Such a good alpha, my very own alpha, I'm so happy to have you. I love you so very much," he coos, bonding mark pulsating with each word.
Katsuki nuzzles into the hand, letting out a small purr, and pulls him closer, locking their lips together. They continued the gentle kissing while Katsuki started to gently rock inside the omega again. Izuku preens at the gentle movement, rocking his hips up to meet his mate's.
Kissing the inflamed mark, Katsuki lightly slides fingertips along Izuku's folds, rolling his clit between his fingers. Izuku preens and relaxes into the touch.
"Good omega, let me take care of you," Katsuki praises, beginning to massage the area around his knot. Though it felt good going in, he wasn't so dumb to know it wasn't painful as hell for Izuku when he pulled out, so he did his best to make sure to relax the omega as much as possible.
Izuku purred at the soft treatment, always being one to enjoy aftercare the most. He enjoyed being dominant during sex, but he wasn't below submitting to his beloved alpha from time to time.
Katsuki leaned down to kiss his mark, spreading Izuku open as much as he could. "I'm pulling out now, sweetheart, relax yourself," he said, pulling back as slowly as possible, wincing in concern at his omega's pained whines, and wiped away the tears that fell on the freckled cheeks.
Pulling out completely, Katsuki picked them both up and onto the bed, curving his body around the omega. Izuku immediately melted into his touch, burrowing his face into his chest.
"So wonderful for me, Kacchan. I love you," he said, placing a gentle kiss on Katsuki's lips.
The action made Katsuki blush, but he managed to keep a straight face. Instead, he bared his fangs threateningly.
"You better believe it. Everyone knows I pamper MY omega in the way he deserves," he growled. "Now, I'm tired and want to sleep. Rest up for the morning," he said, nipping Izuku's nose. "And I love you too, nerd."
Izuku chuckled, holding him tighter, and let his exhaustion take him.
How lucky he was to such an amazing alpha.