Chapter Text
Prostrated on the floor, you coughed and gagged on the rancid, inky fluid. Your eyes watered as you finished clearing the fluid from your throat, wet lashes fluttering open as you looked around at your surroundings. The temperature had suddenly dropped, and when you saw the aisle of massive incubation tubes around you, filled with Nomu, your knees nearly gave out. Around you, your companions also seemed to cough up the inky gunk, heaving and rubbing their sore necks. The aftertaste was horrendous too, feeling as if you’d just swallowed liquid asphalt.
What an unsavory mode of transport.
Wiping the gooey liquid from your mouth the back of your arm, you stood on shaky legs as your companions seemed to all stand and collect themselves before looking around as you were. Just where were you all? Dabi spoke such thoughts out loud, looking down the massive incubation tubes in confusion.
“Nomu? But not like any we’ve seen before,” he commented, and you followed his gaze. You hadn’t had much experience with the Nomu yourself, but even then you could see these ones were different. They looked more condensed, more compact. Where the few you had seen looked like something of a werewolf transformation, these looked like entirely new monsters build from the ground-up.
“Ohoho! You’ve got a pair of sharp eyes, Dabi!” a voice boomed from ahead, making you look towards the source. However, when you did, you were quickly blinded by the bright light behind a shadowed figure sitting at a desk. How had you not seen this bright light before?
“You’re right! These are high-ends. Or rather, my masterpieces!” he continued as you shaded your eyes to look towards him. High-end Nomus, huh? There were so many of them, and the thought made you nauseous. Just because you were running with the villains didn’t mean you approved of these experiments.
“Ah, so it is you, Doc. I want you to recreate some bullets I have,” Shigaraki spoke, as if unsurprised about the new man’s presence. The fact he instantly got to business made you do a double-take at his calm demeanor. Had he been here before? The bluenette certainly acted like this place was more than familiar to him.
As they spoke back and forth, the thought lingered at the forefront of your mind. How much did you really know about Shigaraki? Despite having known him for months now, being bound to him through the mark on your neck, you really knew nothing about him. His childhood, his family, his connection to All for One? It was all a mystery to you; the only fact you really knew was that Kurogiri had been a sort of caretaker.
Dabi’s bright aquamarine eyes flickered to you for a cursory glance before he returned his gaze back to the doctor.
They’re conversations went on for some time, your eyes wandered down the odd fuschia-filled tubes that seemed to stretch for miles into the abyss. The mazes of metal tubing and cold steel cages had left your stomach cold and your hands shaking with a strange foreboding feeling of something so wrong. Vile, inhuman.
“And as for the omega,” the doctor’s elderly voice caught your attention, “I would like to propose a Quirk enhancement.”
Quirk enhancement?
“It wouldn’t be to the extent of the Nomus, I assure you. I would first need to examine her Quirk before I tamper with it. Then she would undergo the operat-”
“Not happening.” Shigaraki growled, the sound reverberating down to your bones.
“Hah?! Do you not want her to grow stronger as well? I could even give her another Quirk to make her more efficient,” the doctor began to argue as your wide eyes looked at the bluenette in surprise. Give you another Quirk? And Shigaraki was denying it? A tingling feeling spread at the base of your skull, as if said alpha was strictly conveying don’t get any ideas as his ruby eyes flickered to you for a cursory glance before glaring at the doctor once more.
“She’s making progress on her own. And no offense, but I don’t want her to become part of your experiments,” Shigaraki grumbled with a sneer. Not far from you, Dabi huffed a chuckle.
“Hate to admit it, but I agree with the boss on this one.” The doctor visibly deflated while you swelled with a sense of pride, preening a bit when Dabi sent you a tired grin. Your mates not only acknowledged your growth, but got defensive for your well-being. Your eyes practically lit up with joy as a sweet, pleasant scent began wafting through the room. The alphas in the room relaxed a fraction, their biology rewarding them for making an omega happy. Their omega.
And happy you were, despite the unease simmering away deep within your abdomen.
-
The unease that became a rolling boil, threatening to spill over as you watched a beaten and bloodied Shigaraki stand before a broken and defeated Redestro. The unsettling grin spread across his chapped lips caused the hair on the back of your neck to stand on end as you gaped.
Dabi felt the muted feeling of your fear and confusion zip through the recesses of his mind through his bonding link. His aquamarine orbs locked on you, watching your body language stiffen.
A dangerous, disheartening thought seemed to echo in your mind endlessly as you watched the no-longer-bluenette gloat in victory before his opponent, Gigantomachia bowing loyally out of the corner of your eye. Unconsciously, you reached out to your alpha, searching. For what? A response, an identifier?
Wild crimson orbs locked on you at the same time your inquiry was rejected. By someone wearing your mate’s skin. By the man who’s eyes didn’t match his body, eyes seeming to silently plea for something.
But the third side of your bonding link was silent, removed from the triangle. An ache in your chest pulsed as you watched Shigaraki turn back to Redestro, his face hidden by his whitened locks.
Those terrified crimson eyes burned in your memory.
The sound of your name from your side ricocheted off your ear, but hit the mark the second time. To your left stood Dabi, a sharp pensive look on his tired face. The furrow between his brows spoke volumes from a man who stood apathetic before even the largest of foes.
“You feel it too, right?” You barely recognized your meek voice, concern gripping your throat like a vice. Dabi’s eyes searched yours for a moment, debating on answering before he looked to his boss once more, standing atop the pile of what remained of an entire building, razed under his newfound strength. The sight alone was enough to remind him of Shigaraki’s terrifying power.
“Dabi, that isn’t-”
“I know,” he interrupted in a low hum, searching your eyes again. “But right now we have other things to worry about. You should find Twice and Toga, make sure they’re alive.”
Pursing your lips, you felt your fists clench in frustration as you stood your ground. This wasn’t the time to deflect the elephant in the room; however, he had a point. Last time you saw Twice, he was hysterical and crying something about Toga. Well, several of him were. Your teeth hurt with how hard you clenched your jaw before you relented, finally tearing your eyes from Dabi to look for your friends.
You couldn’t stand to look back towards Shigaraki anymore.
By the time you were far enough from the epicenter of the devastation and ruin, your bonding link with Shigaraki started to peek through the holes in the wall. He was returning to you it seems. The relief made your body relax ever so slightly as you followed a frantic Twice clone.
“She’s this way, please hurry! Slow down! She’s bleeding a lot! I-I tried to give her more blood, but it’s not enough!” The frantic tone of his voice was enough to make you pick up the pace. You barely noticed the growing puddles of blood literally the sidewalk and grass as he led you to an unsuspecting shed. The splashes of dried blood on the ground made your stomach turn cold.
Nothing could have prepared you for what remained of Toga. Blood stained her cute winter coat as she laid still, facedown in the dark, musty shed. Your stomach dropped and your heart raced as you held your breath; you couldn’t breathe until you made sure she could.
“Toga?” you asked cautiously, ignoring the pain that shot through your thighs as you collapsed on your knees next to her cooling body. Carefully, you rolled her over. As soon as a groan left her thin lips, you heaved a sigh of relief. She was alive, and that’s all you needed at the moment. Even if hanging on by a thread, she was alive.
Instantly, you got to work trying to find her biggest wounds. That task in itself proved more challenging than you expected, her body being littered with blast marks, bruises, and pieces of missing skin altogether. The smell was nauseating, the air filled with iron and char. Thankfully, the poor girl was unconscious and, hopefully, unable to feel pain as you gently pressed your hands to the burns and scars across her forehead and eye. Twice watched with bated breath as the shed glowed in a hue matching your iris color, wrenching his mask off to watch you heal her wounds one at a time.
In the wake of your shaking hands, Twice was mesmerized by the growing collection of scar tissue under the dried blood. It seemed to follow wherever your hands touched, the gaps in your fingers leaving open wounds.
This was something you took notice of too, the revelation making you pause to study this new discovery. Curious, you took a single finger and slowly moved it across a patch of missing skin on the blonde’s thigh. Like a mystical pen, you drew a swirl pattern and watched in amazement as the skin regrew in an instant in the same pattern.
“Woah,” Twice breathed for a bit before his thick lips curled in a childlike smile, “can you draw a heart?”
-
“I knew it was a good idea to keep the doc away from you,” a voice praised lowly in your ear, sending a shiver down your spine as you shook. Though, you had a hunch that it wasn’t entirely attributed to the warm breath on the shell of your ear. Underneath you, Shigaraki sat in a large chair like a throne in his designated room, legs spread wide so you could lay across them. An arm was wrapped around your back, curling back and rubbing gently across your shoulder while the other was draped across your thighs. Chapped lips roughly trailed from your earlobe to your jaw, nipping languidly. Unhurried, your alpha took his time relishing in the smooth texture of your skin.
“I heard what you did for Toga. You’ve gotten so good with your Quirk,” he hummed, his thumb brushing against the skin of your bare thigh. Ever since moving underground, you were given a new outfit, one similar to Toga’s, that revealed the skin of your legs to the world, but more importantly, to him. You had asked for something warmer to resist the chill of the underground, but your request fell on deaf ears.
“I’m so proud of you.”. Another shiver made your muscles spasm under his touch. Somehow, your body was responding to him even moreso than before; perhaps it’s because for the most part, you knew this was your alpha. The bonding link had almost completely returned, yet felt thinned. Like a poorly healed bone fracture, technically fixed but susceptible to breakage from weaker forces.
It had been three days since you’d seen Shigaraki, only getting glances of Dabi once in a while during your stay in your designated room. With the upset across the base, Shigaraki and the League had been called in for several meetings to determine the future of the group. Dabi mentioned that they would be rebranded as an entirely new faction now. So, you spent most of your time with Toga and Twice, checking their wounds after bouts of feasting on sushi.
It was amazing to eat real food again, to shower and clean with actual soap. To rinse your body of blood and grime, watching it swirl down the drain in a muddy whirlpool.
But the uneasy feelings in your stomach had continued to simmer away softly, ramping up in intensity ever since you were able to finally sleep on a mattress again. It wasn’t until you had woken up to find the covers swaddling your curled form that you realized that you were very overdue for your heat. The last one you could remember was in Overhaul’s lair, and that was months ago.
Shigaraki must have noticed the signs as your body seemed to prepare itself for that quarterly time of year; he had begun paying special attention to the mark on the junction of your left shoulder. Those chapped and scarred lips would gently suck and nip, but never pierce the skin to renew his mark like Dabi had done more often.
“Mm,” you hummed, a shiver coursing through you as his teeth grazed the skin, “I was surprised to find out that it follows wherever my hand touches,” you huffed. Shigaraki’s bandaged hand began wandering towards the junction of your thighs, kneading it as best he could with missing fingers. It was an odd feeling, to say the least.
“It’s kind of hot, dontcha think?” he drawled, pausing to lean back enough to let his crimson orbs bore into yours. As badly as you wanted to retort, the sudden feeling of two fingers gently brushing against your clothed lower lips made your eyes shoot downward.
“Your hands put things back together, and mine destroy them.” Your breath hitched when his fingers suddenly moved your panties to the side and began to slowly rub against your bundle of nerves, rolling the pads of his fingers slowly but with a steady pressure that had you keening in his touch. He really wasn’t going to waste much time, was he?
“Speaking of putting things together, you should be cycling any day now,” he whispered, watching your facial expression as he continued to slowly rub circles on your clit, not minding the fact your thighs pressed together at the sudden intimate contact. Embarrassingly, you could hear the faint sounds of lust as slick began to seep from your core already. This was promptly noted by your mate who preened with pride that he was having this effect on you so quickly.
“Maybe even today? Can you do that for me, omega?”
It felt like a switch was physically flipped inside your stomach, and a fire promptly erupted. The smoldering flames followed every blood vessel in your body and you suddenly felt too hot in your own skin. Shigaraki’s pupils dilated with lust at the rapid change in your scent, arousal beginning to cloud his mind.
Like a knee-jerk reaction, he moved to stand up with you, removing his fingers and using his hand to steady you. Leaning over you, you flushed at his intense gaze. The want in his eyes was almost palpable. No words were needed as you both began to undress, a frantic need coursing through your very souls. Your head felt light and buoyant, your neck throbbed, and your lower pelvis cramped painfully with the need to be filled. The wave of pain was rapid, nearly making you double over as you shimmied out of your underwear last, watching as Tomura also yanked his boxers down.
The sight of his half-erect cock was enough to make your toes curl; this would be the second time Tomura made love to you, and the second time you were in heat around him.
As you crawled backwards onto the mattress behind you, the ivory haired alpha followed you without missing a beat. The hand with missing fingers went back to pressing and swirling your throbbing clit as you leaned back, letting the back of your head rest against the covers as a pleased sigh left your lips.
Yes, this is what you’ve been needing, craving. A release, a moment of intimacy. Gently, you rolled your hips into his hand as pleasant tingles shot through your nerves like fireworks, head becoming light and foggy. It felt as if the whole room was suddenly a sauna, heat washing over you in waves that left your forehead sweating and your stomach cramping. Subconsciously, your walls began fluttering as if telling you you needed something inside you five minutes ago.
“Tomura,” you breathed out a moan as his fingers slid down and prodded at your entrance, his crimson eyes wide and feral as he locked in on your facial expression. The way your brows knitted, the flush across your soft cheeks, the tiny beads of perspiration growing on your hairline. The side effects of your heat were making his hairline damp as well; his body felt as if his entire internal temperature was rising in sync with yours. The air was thickening as your moans began to fill it, his fingers diligently curling and smearing your slick around as he stretched you.
The last time he had gotten impatient; he wanted to take his time with you, properly tend to you as your alpha, but his cock throbbed with need, his lower stomach flexing and tightening in response to your squirming. The memory of how warm and soft your insides were…he couldn’t wait to relive it.
“So good for me,” he growled praise as his fingers finally left you, “I don’t think we should wait any longer.” With a nod, you spread your knees just a tad wider so Tomura could slot himself between them, lowering himself to his elbows.
Eagerly, you bucked your hips into his, feeling the tip of his leaking cock catch on the hood of your mound. Groaning, Tomura reached down to align himself, unable to wait another second. First he slowly rocked his hips, only letting his tip enter you a few times. When your arms reached up to his protruding shoulder blades, he finally let his weight fall on you, sinking down into your depths with a single thrust.
You tensed at the sudden intrusion, the delicious stretch of finally having him inside after so long. A hiss left your teeth before Tomura’s chapped lips covered your mouth in a sloppy, opened mouthed kiss. His arms curled around your torso as you crossed your ankles on his lower back, bucking up into him eagerly.
With a groan of your name, he began to steadily piston his hips back and forth, making sure to stay as deep as he could. The feeling of his heavy sack plapping against your lower lips made your toes curl, the pressure inside your lower abdomen making your nails dig into his pale skin. Red crescents appeared on his back as he was encouraged to move faster, burying his face into your neck as he groaned and panted heavily in your ear.
Your heart raced with joy and love, feeling his heartbeat matching your own on your bare chest. Eyes rolling back, your back arched as you bucked your hips in tandem with his, pelvises knocking together loudly.
Compared to last time, Tomura was so much more intimate with you. He wasn’t fucking you through your heat, he was making love to you. Butterflies were erupting in your stomach as you held onto him more tightly, letting your gasping moans fill his ears for encouragement. He was so close, so much of his pale, sweaty skin was pressing into yours, but you wanted him closer.
“I love you,” you gasped out in the throes of pleasure as the mattress steadily rocked. Hearing your words made him falter for a beat before he buried his head further into your neck and began to increase his pace. His gums ached as his canines elongated, ready to remark you.
“You’re mine?” he growled, his voice strained with pleasure.
“Yours,” you reassured, feeling your back arch higher as your lower stomach began building pressure. Hearing this, Tomura’s teeth latched over his original mating bite, canines piercing the skin as his hips began thrusting with abandon. Your moans turned to cries of pleasure as he frantically fucked you, the pain sizzling through your neck and causing a gush of slick to wet your inner thighs.
The way his cock rapidly sank in and pulled out left you seeing stars, your thighs clamping roughly as your orgasm quickly approached. Swearing his tip was punching your cervix, you bit into his shoulder to quiet your squeals as your lower stomach grew impossibly hot.
The knot in your stomach finally tightened as your body spasmed, your muffled cry growing in volume as your legs clenched together quickly like a reflex, walls fluttering and gripping Tomura like your life depended on it, like you’d die if he wasn’t inside your deepest depths.
With a roar in your ear, Tomura continued to plow you through your orgasm, his pace faltering slightly at the tight grip your body had on him. With every thrust, you could feel the base getting larger and larger as he slowed. Thrusts growing shallow, you felt his knot beginning to catch on your lower lips before he finally buried himself as deep as he could go, grinding his pelvis down into yours as the knot finally swelled inside you. He released a long moan, eyelashes fluttering as his release coated your insides. It would have overflowed if it wasn’t for his knot plugging you up, as intended.
Your body melted as every muscle finally stopped tensing, letting your legs slip off his lower back as he rolled the two of you over to swap positions. Arms curled over your waist, you let your head fall into his chest and under his chin, panting as you tried to catch your breath and steady the heart beating as if to break out of your ribcage. Feeling as if the fog in your mind had been cut through, you closed your eyes as you processed what you could. A familiar tugging on the back of your mind grew more potent.
The satisfaction of having a knot so deep inside you was so very pleasing to your inner omega, causing a shiver to rack your spine.
Or perhaps the cool, fresh air wafting into the bedroom played a part.
Dabi quietly shut the bedroom door behind him, nose immediately inundated with the musky, heavy scent of sex and pheromones. He could practically taste your sweet slick in the thick air mixed with the scent of your heat; however, it was obvious what happened when he saw your cunt stuffed with Tomura’s cock and the creamy white ring around the base.
“Wouldn’t hurt to knock,” said boss grumbled to the new addition to the room, glaring as the ebony haired alpha locked the door.
“Wouldn’t hurt to lock either,” he spat back as he began shedding his attire, hawking the way you looked over your shoulder to him with glossy, needy eyes.
“Anyone could have walked in and enjoyed the show,” he teases, shucking his boxers off and stepping out of the pool of fabric on the floor hastily. Licking your parched lips, you squirmed a bit as Dabi approached the bed from your feet. Crawling up onto the mattress, the covers dipped with the new weight as he sat back on his haunches behind you, languidly stroking himself as he used his other hand to massage and spread one of your ass cheeks.
“Hope you don’t mind an encore, princess, I’m feeling pretty needy right now,” he grinned, staples pulling on the skin as your blushed returned across your cheeks and the tips of your ears. Tomura groaned at the way you clenched around him in excitement.
The hand holding your cheek dipped down to gather as much slick as possible from your inner thigh, reaching up and spreading it down your crack before prodding at your puckered entrance with his index finger. A zip of panic went through your chest; you hadn’t expected that.
“Dabi, wait! I haven’t-“
“Don’t worry, you’re in heat,” he reminded as he replaced his soaked finger with his now-stiff cock, using both hands to squish your cheeks together to make a tighter fit as he slid back and forth to spread your slick across his solid shaft. The rosy tip peaked out from between the mounds of flesh, prompting him to swallow his thick saliva. As he gave shallow thrusts, your cheeks burned and your walls clenched around the knot inside you.
“Relax, doll. You can take us both,” he huffed with a wolfish grin and hooded cerulean eyes, his own cheeks flushing in arousal. If he still had sweat glands, he’s sure he’d be feeling the full effects of your heat on his body. Dabi finally spread your ass and prodded your second entrance with the tip of his cock, now slicked. With painstaking care, he slowly eased himself inside with shallow thrusts, pausing to let the rings of muscle relax for a beat. Moans encouraging him, Dabi let himself push into you so cautiously, making sure not to hurt you. Finally feeling your body relax, he was able to let his whole weight collapse into your backside as he sank every inch in with a loud groan. Your own moan ripped through the air as you began panting, trying to get used to the feeling of being stuffed completely full, with a knot filling your other entrance.
You felt like you were going to get torn in half.
But the pure euphoria you were experiencing, the utter bliss of having both alphas inside you, pleasing you, was enough to make your eyes begin to water. It was such an odd, exhilarating sensation to feel both of them inside you. One prodding your cervix and the other nudging through rings of muscle. Toes curling tightly, you whined as you felt like they were literally inside your stomach.
Your heart and body were so full, floating on cloud nine as Dabi began to gently rut into you from behind, his thick fingers digging into the flesh of your hips. With every push downward, you were forced a little further onto Tomura’s knot, just enough to feel it rub against the most sensitive parts of your walls. But the size of the inflated organ kept you pressed so tightly against him, like a barb that refused to let go.
Salacious moans filled the room as Dabi took you slowly, not wanting to push you too fast as you’d never done anal, let alone during a threesome. His heavy fingers trembled ever so slightly as he pushed and pulled on your hips in time with his own.
Like Tomura, the last time Dabi had you was fast, exciting, the first time. And this time, he was going to savor it.
Well, as best he could.
He began to slowly increase his pace as your moans grew louder, back arching up to give him a better angle. The rings of muscle had a death grip on his cock and he feared for its safety as you began clenching in pleasure, calling his name out so sweetly. It was music to his ears, his heartbeat thumping in his ears in a steady rhythm. A rhythm that synchronized with yours and Tomura’s.
Three hearts beating to the same drum, three souls connected into one. A bond that was no longer a string, but an intricate, sturdy web.
It wasn’t just the pleasure that brought you to your peak again so soon, but the love surrounding and engulfing you like a raging swell in the ocean. The feeling of rising up so high you’d touch the clouds, brought crashing down in a flurry of pleasure as Dabi rolled his hips into you with a bruising force, needing to be deep within you.
“Fuck, why didn’t we do this sooner,” his voice came out as a strangled groan as felt you clench down again, your nails nearly tearing holes in the bedsheets.
It wasn’t until Tomura began thrusting his hips upward in a frenzy that you truly screamed, desperate to be brought to completion again. You were so close, your muscles tightening as your eyes slammed shut. You were already seeing stars behind your lids, the sounds of wet skin slapping, throaty groans and pants, and your cries of pleasure flooding your ears and drowning the world out.
And finally, like the second crashing wave, you were fucked to completion once again on Tomura’s knot still swollen inside you. Your vision turned white and for a cursory moment, you feared you’d gone blind. Mouth gaping, saliva dribbled from your lips as you came down from your high.
Dabi had pulled out of you, fisting his cock frantically before his head was thrown back. Creamy white ribbons adorned your back like a decoration as he slowly came down from his own high. The mutual feeling of satisfaction and completeness wasn’t in the recesses of his mind, but consuming the entirety of it.
His mate was stuffed and satisfied, rode hard and put away wet.
With a huff, he gave your ass a light smack, earning a tired groan, before standing and sauntering towards the connected bathroom while your body thrummed in the afterglow. The sound of the bathtub running was a white noise that could easily put you to sleep, your muscles and bones weighed down like lead from exhaustion.
And later with some coaxing as you sat between them in the tub while they growled over who was a better mate, smelling of smoke and ash...your heart raved with joy. Perhaps in the end, this is where you were meant to belong after all.