Chapter Text
Tobirama gasped as Madara’s enthusiastic thrusts caused his hands to slip on the wet stone surrounding their pool, and he was saved from breaking his nose on the ground by a searing hand gripping into his nape—fingers so long they almost encircled his throat, too—that would have made him go limp if his every muscle weren’t pulled tight by the futile attempt at keeping the helpless arousal at bay, that was unavoidable during the early stages of any heat.
For all that Madara appeared soft while relaxed—comfortably cushioned in a way that had Tobirama aching to burrow himself into the unsuspecting alpha on more occasions than he cared to count—there was no mistaking his strong build for anything else than sheer muscle mass as he put his back into reducing Tobirama to a shaking mass, making the omega’s drooling cunt uselessly gush its aphrodisiac juices while his ass was pounded by the sheer force that this particular brick house of alpha was able to put behind his thrusts without any apparent effort.
The grip on his nape tightened deliciously, and Tobirama’s thoughts blanked for a heavenly moment as the first orgasm crashed through his system, and Madara relentlessly fucked him right through it.
Clenching his teeth, Tobirama tried to subdue his need to bite, to mark Madara as his and rebuke any omega daring to eye the alpha Tobirama had chosen for himself. He wanted to sink his teeth into Madara’s hard muscles while they fucked or sparred as much as he wanted to sink them into soft flesh when they rested, bundled up in a nest Tobirama would build just for them, to keep them warm and safe as he quenched his thirst on Madara’s blood.
Caught in the bliss of his momentarily sated hormones, Tobirama yearned for Madara to fuck his cunt instead, to fill it with his seed that would do nothing more than tease how it might feel to truly share a heat. Being filled until he was dripping with it for days to come would be of no consequences until Tobirama got his teeth into Madara, thinned his blood with the omegan venom that Tobirama had trouble swallowing down as it kept filling his mouth with the anticipation for the taste of blood, the taste of life from which his body would get the minerals and hormones needed to, over time, build fertility with his chosen alpha.
But even as single-minded as he currently was, Tobirama wasn’t willing to push for more than Madara was ready to give. And he knew that if the alpha were to come into too close contact with Tobirama’s slick, it’d send him into a rut that would leave him too soft and pliant to defend himself against a thirsty omega’s attentions. And Tobirama wasn’t merely thirsty; he was ravenous.
For all that Madara had beautifully followed Tobirama’s cues in a way that Tobirama had never expected—it made his blood burn with the need to consume, to take and take and never let go—sharing a mating circle, allowing their biology into drawing them together even more closely until Madara was put in real danger of being bitten and claimed, would be more than the Uchiha was willing to commit to out of the blue.
After all, most recently, it was almost to be considered a feat for Tobirama to simply enter a room without driving the blustering alpha away with his presence alone. That the endless arguing and occasional pointless yelling had stopped was a nice change in pace, but Tobirama didn’t know what he’d done to deserve Madara’s scorn in a way that left him red in anger whenever they spoke, even if Tobirama tried to hold his tongue. What he’d done that Madara, instead of addressing his issues to Tobirama’s face, had taken to turn on his heel and leave the room muttering under his breath.
But today, Madara unexpectedly behaved more like a skittish maiden eager to please rather than as if Tobirama’s mere existence was offending his sensibilities, and Tobirama didn’t know what had happened to prompt the reaction, but he was willing to milk the situation for all it was worth.
Just as he would milk Madara, who finally broke his impressively enduring rhythm and clenched Tobirama’s hips in a delightfully bruising grip as he rutted through his own orgasm.
Tobirama was able to spare a single regretful thought to missing out on the delicious stretch a knot would bring before he was suddenly lifted out of the warm water—barely catching himself on his hands and knees outside the pool’s edge—and Madara buried his face between Tobirama’s cheeks with a groan. Hungrily licking and sucking at the place he’d just vacated with a vigour that left Tobirama gasping for air and emptied his brain rather successfully from any thoughts at all as it sent him over the edge once more.
He came back to his senses with his face pressed into the crook of his folded arms and Madara’s broad hands patting his shivering thighs and heaving flank in an attempt to soothe despite the hot tongue in Tobirama’s ass still savouring every twitch it could wring out of him. Even without a rut, the alpha proved himself to be an insatiable monster, and it suited Tobirama well, even if it left him wondering, dreaming, about Madara’s libido during a rut. He held his breath as the hands on his skin started to wander, thumbs teasing the sensitive flesh of his inner thighs as they wandered up and up and only hesitated for the barest moment before they ran along his folds in a careful caress that had Tobirama keening.
When Tobirama didn’t rebuke him for his daring but instead canted his hips to give better access, Madara grew bolder. The insufferable man didn’t take the invitation for what it was, though. Instead, Tobirama felt his whole body flush and his stretched-out hole clench excitingly at the tell-tale twitch of chakra that betrayed a Sharingan’s activation before Madara opened Tobirama’s folds with his thumbs, pinned them to the side and laid Tobirama’s hidden centre bare to the alpha’s gaze.
The knowledge that Madara couldn’t help himself but commit the sight Tobirama presented to memory for eternity was the only thing keeping him from complaining that Madara’s devious mouth had left the place Tobirama wanted it most. Neither could he find it in him to care when strong fingers gripped into the meat of his arse and pulled his cheek apart, too, cold air hitting his sore rim as Tobirama was exposed to the fullest.
It might have been his imagination—spurred on by the arousal of hearing the alpha of his choice letting out a gutted moan as he held Tobirama open for his viewing pleasure—but Tobirama was almost sure he could feel a trace of thick seed finding its way from his used hole down to his cunt, joining the slick that kept gushing out with his delight at Madara’s appreciation of the continued exposure.
Without warning, Madara’s hands wandered back to the already tender places at Tobirama’s hips—adding pressure to the blooming bruises that had Tobirama gasping when the dull pain registered and warred against the sharp arousal crashing over him in waves as the heat rolling off the approaching Uchiha was a nice contrast to the cool air that had been teasing his exposed wetness—and a closemouthed kiss landed on his lower lips as soft as a butterfly’s wing.
While it was the slick an omega produced during their heat that would send an alpha into rut upon ingestion or having it come into touch with any of their glands, it was Tobirama who was suddenly overcome by sheer need from the simple touch.
He hadn’t expected it and would never have asked for it, but if it was on offer, he wanted more.
“You want to kiss my lips? How forward,” Tobirama panted, and the approving hum vibrating against his folds was exciting enough to prompt a new bout of slick gushing out of his cunt that made Madara moan like a wanton whore.
With the alpha making a home between his legs, carefully kissing and nosing the sensitive area, Tobirama could only imagine how Madara might look: lower face wet from Tobirama’s slick, maybe with traces of his own seed still clinging to his lips. But as promising as the idea of allowing Madara to take his time was, since the opportunity already had presented itself, Tobirama could think of a better outlet for Madara’s unexpectedly adventurous desires.
“How about I sit on your face instead?”
It was a gamble. A closemouthed kiss was one thing, and breathing in Tobirama’s scent where it was strongest was without serious consequences, but-
“Fuck yes,” Madara groaned and pointedly licked a broad stripe over Tobirama’s wetness before he plunged his tongue in, readily feasting on the aphrodisiac slick at its source despite knowing its pheromones would send him into a rut before too long, and fully kickstarting Tobirama’s heat in turn.
Tobirama spared a vague thought hoping that his brother had been sensible enough to inform the onsen of their predicament so they’d ready a room for them with everything an unbonded pair sharing a cycle would need, but it was soon lost as he had more important issues at hand. Like how—while good, amazing even—this was not what Tobirama did have in mind.
Pushing back against Madara’s face while hooking a heel under the unconcerned alpha’s arm, Tobirama managed to flip them over in a feat he wouldn’t ever be able to replicate nor explain, if only because it involved subconscious manipulating of the water still surrounding them. But he didn’t care for the logistics as long as it left him half kneeling, half sitting over Madara’s face as the alpha was laid out beneath him on one of the partway submerged seats circling the pool, with his head tilted back over its edge in a way that might make it possible for Tobirama to ride Madara’s face without the risk of breaking his neck, instead of merely sitting on it.
Not fazed by the change in pace and apparently just as excited as Tobirama about the potential their new position brought, Madara was quick to retake his hold on Tobirama’s hips and guide him down on his face for good, licking into his cunt like a starving man, kissing and carefully biting as he went.
An animalistic growl vibrated against his most sensitive place when Tobirama reached back and fisted into Madara’s thick hair to have something to hold onto as he tried to follow the demand of Madara’s hands guiding his ride. It didn’t take long for Tobirama to find his own rhythm, greedily taking the pleasure that Madara so readily offered, before he was distracted by the steadying hands leaving their place to sneak down and probe his puffed rim before slipping into the still stretched and wet hole, starting to fuck it with crooked fingers in tandem with the relentless tongue fucking his cunt.
Apparently realising that Tobirama would otherwise cum again right away, Madara’s free hand took a firm grip on the base of the drooling dick at the same time as he doubled his efforts to annihilate Tobirama’s sanity. But with the broad hand almost large enough to cover the omega’s length in full, it pushed Tobirama over the edge rather than keeping him there.
With his cock cut off from spilling his sweet release, the blinding orgasm went through Tobirama’s cunt instead. A new wave of slick that might as well have drowned Madara—trapped between Tobirama’s twitching thighs without escape—if he hadn’t been drinking it down as greedily as he was.
Tobirama doubled over from the force of his orgasm, forehead resting against his up folded knee, and rode it out by rocking against Madara’s face, unable to help himself and keep still. With his heat slowly coming in full swing, there was no such thing as painful overstimulation in the general sense, but even so, Tobirama was thankful when Madara’s hands returned to their earlier soothing caress over sweat-soaked skin.
Taking a deep breath, savouring the last tremors running through his muscles, Tobirama opened his eyes that he hadn’t noticed falling shut and-
Oh.
It should have occurred to him sooner, but somehow it had slipped Tobirama’s mind that his fully developed heat meant Madara’s rut had been triggered—of course, it did, with the amount of slick the alpha had feasted on. And with a rut came…
Oh, that wouldn’t do.
Half-formed it might be, there was no way Tobirama would let this promising tease of a knot hiding in the dark water go to waste. It wasn’t as if he could get pregnant, either. He’d just to keep his teeth to himself—no matter how much he ached to sink them into Madara—and they’d be good to go. No reason at all to deny himself the rumoured joy of an alpha’s knot. (Of keeping Madara closecloseclose, bound together for the foreseeable future, rutting against the enormous stretch and getting filledfilledfilled until he would be dripping and carrying Madara’s scent for days just as the pheromones of his slick would ward off any omega trying to steal his alpha. With how much effort Tobirama had put into rubbing it into his skin, Madara would reek of him for weeks to come, and Tobirama wouldn’t have it any other way. He’d always been particular about marking what he perceived as his, and his chosen mate was no expectation. Not now that he’d had an opening.)
Ignoring the tightening of Madara’s hands on his hips and the dissatisfied growl against his cunt, Tobirama lifted himself off Madara’s face and slowly slid down the impressive chest—hips canted to spread his slick and mark the alpha further—until he came to rest in Madara’s lap. Despite his flexibility, there was a delicious stretch to his inner thighs when Tobirama had to spread his legs to get his knees outside Madara’s bulk, balancing his hands on Madara’s knees to navigate the fat cock to his cunt. Thankfully, Madara got in with the program and used his hands to guide his tip to Tobirama’s starving entrance.
There was a pause, so brief Tobirama would have missed it if he hadn’t been gagging to sit on that cock for the past months, but whatever his thought about Madara’s hesitation would have been was lost to the firework going off behind his eyes when Madara breached him and settled into his cunt with a single thrust, pulling Tobirama’s back flush against his soft belly and tits, keeping him there to writhe in place as he tried to adjust to the cock stretching him far wider than the tongue that had been preparing him.
Tobirama was no virgin, not in any sense of the word, but an alpha’s cook sure was a different experience than the beta he usually stuck to out of good sense. Fucking a member of one’s own presentation was just a bad idea all around, for omega even more so than for alphas—their hormones and instincts urging to defeat the competition, feasting on them without any pleasure at play.
When Madara started to pass his time waiting for Tobirama to adjust by laying a path of lovebites from his ear down his neck to his shoulder only to mirror the process on the other side, Tobirama couldn’t help himself and started to rut against Madara’s strong thighs and thus getting as much friction from the cock settled deep within him as Madara’s vice grip allowed for before he pinched the arm and Madara gave him more room to move.
The blunt teeth on his sensitive skin—a teasing reverse to an omega’s mating bite—made Tobirama’s blood boil, an itch crawling under his skin to reverse their positions, to turn around and sink his own sharp teeth into Madara’s flesh and get the alpha’s sweet blood on his tongue.
Between his pants and moans from the pleasure Madara so freely offered, it was difficult to swallow down the excess of venom pooling into his mouth, and Tobirama had to realise it was a good thing he’d decided to trust Madara with his back and ride him like this. There was no chance in hell Tobirama would have been able to hold onto his god sense and keep his teeth to himself if the alpha’s neck, his anything would have been within easy reach.
“Wanted you so bad,” Tobirama moaned when Madara let go of his neck and instead started thrusting up to meet the punishing pace Tobirama had set. The easy admission made Madara’s fingers flex into Tobirama’s already bruised hips, and the obvious reaction spurred him on even more until his mouth was running away from him.
“Want to bite you, mark you, own you. Scar you all over until no omega will ever dare again to look at you because they know you’re mine. Want to thin your blood with my venom and gorge myself on it. Drink from you again and again until my body is ready for your seed, until I’m ready for you to bloat me with it, make me fat by carrying our cubs.”
Tobirama could have gone on, telling Madara of all the things he’d dreamed of doing with the alpha— to the alpha—that had caught his interest so thoroughly until he couldn’t see anyone else. But honestly, who could ever compare to Uchiha Madara? Strong and caring Madara, who still yielded so sweetly whenever Tobirama attempted the littlest of pushes and readily gave more than Tobirama would have ever thought of asking for.
It gave him hope that his interest wasn’t entirely unrequited, that despite his uncommon slender frame and waspish temper, he might be desired in turn, if only a little. But even in his most depraved dreams, Tobirama hadn’t dared for this, for Madara to take him as he desired, to feast on his slick with vigour and take the consequences of a rut it brought. Tobirama hadn’t dared to imagine this, the tease of a knot still forming catching at his entrance whenever he rose up, only to slam down again.
Tobirama would have never expected Madara to bare his throat as if inviting Tobirama’s teeth to it, all but asking for the venom that would thin his blood and speed up its production for Tobirama to feast upon it, to take the nutritious essence that, over time, would kickstart his own biology into fertility, until they’d be able to procreate with each other and no one else.
The profoundness of the gesture made Tobirama falter. No matter their arousal, an alpha would never simply bare their throat to an omega. That was for-
It was for-
Mates.
Cheating with his water affinity yet again, Tobirama used his agility to whirl around in the tight cage of Madara’s arms and hovered sacredly a second, just long enough to take in the for once openly shown face, wild hair slicked away from it by water, sweat and the cumulation of their fluids alike, the same half dried mess of slick and spit and seed that was all over the regal face and hungry mouth.
That damned mouth that had wrecked Tobirama and derailed him from his spontaneous plans of taking the alpha apart, the damned mouth that Tobirama wanted nothing more but kiss, bite, lick into.
So he did.
Sourging in to steal a first taste from the tainted lips, Madara met his every bite and lick with the hunger of a starving man, as if hadn’t just ravaged Tobirama’s lower lips and gotten drunk on his slick. The tingling sweet taste of himself mingled with the salt of an alpha’s release made Tobirama groan into Madara’s mouth and grind into his lap, seeking friction against the hard dick and promising knot. It was messy and uncoordinated, and Tobirama growled at the back of his throat when Madara got a hold of his ass and pulled him off his lap, only to cry out in strangled pleasure when he was finally pulled on that cock again, Madara grinding back into the wet heat of Tobirama’s cunt the same moment his tongue traced Tobirama’s sharp teeth and a hint of blood filled Tobirama’s mouth.
It was-
He wanted-
“Wait!”
Everything came to a stop, Madara’s hands letting go of Tobirama’s hips as if burned, his head snapping back and away so fast Tobirama winced at the cracking of his neck that must have hurt like a bitch. But at the same time, it gave Tobirama room to breathe —air that smelled like sex and slick and belonging, the aroma still clogging his nose, his senses—and try to calm down, to get a hold on his instinct and desires, to content himself by chasing the taste of blood on his teeth with his tongue rather than attacking his alpha like the feral animal he was at his core, barely caged and ravenous. Wanting nothing more but to taste the alpha, bite him, mark him, conquer him.
“Tell me you want this,” Tobirama growled with strangled breath, his voice wrecked and grating like far away thunder from the effort it took to keep a hold of his overwhelming want. “Tell me I can have you. Can keep you.”
This close, Tobirama could see Madara’s expressive eyes dilating further until the darkness of his eyes had little to do with its natural colour but, instead, was a show of his desire, rimmed by the red of the Sharingan that Tobirama had already forgotten about.
“Please.” Madara’s voice was a thin, desperate whine and showed nothing of the booming quality it usually held, and Tobirama was having none of it. If they did this—and by the sea did he want to—then Tobirama would need more consent than this.
“Say it.”
The harsh command punched a wanton moan from Madara’s throat—left him panting as Tobirama could feel the dick nestled in his insides twitch and the knot grow—and the possibilities made Tobirama want to grind down, to guide Madara over the edge with nothing but his words and a command, wanted to take him apart and set him back together and-
No. Not now. Later.
“Say it,” Tobirama crooned instead, sweetly as the omega he was by nature if not by nurture. But if the past moments had shown him anything, then that Madara would find no fault with Tobirama’s possessive temper, his need to control. He couldn’t wait to test the limits of the alpha’s willingness to submit, and involuntarily, his cunt clenched at the thought of how pretty his alpha would be down on his knees with Tobirama’s thighs wrapped around his head for hours on end. Or, huh, maybe he would sit on Madara face again. But this time, the alpha would lie on the ground, stretched out for Tobirama’s viewing pleasure, red eyes raking over the expanse of smooth skin, watching hard muscles bulge and twitch under the protective layer of softness that cushioned Madara’s frame ((Tobirama wanted to burrow into it, make a home and never leave)), as he tried to adhere to Tobirama’s command and stay still while the omega rode his mouth. Or-
“Please, Tobirama,” Madara implored breathlessly, eyes clear and focused for all that his messy face was flushed bright red from the tips of his ears down to his thick chest, and, damn, Tobirama wanted to taste there too. Wanted to lick and bite until he could drink from Madara’s tits in a mockery reverse of their biologies. “Have me. Keep me. Bite me. ”
There was a lot to be said about Tobirama’s patience and his self-control. But little of it could be applied to this moment where Madara allowed him to mark him as his, to get his teeth and venom into his flesh and get a start on what would end in an everlasting bond, would make them mates and allow them to skip all the pesky courtesy rules men of their station were subjected to before they even could start courting a potential spouse.
What made Tobirama come undone, though, weren’t Madara’s words. It was his scent, heavy and heady in the air, the desperate want conveyed by it that had little to do with sexual attraction while his dick was buried in a wet cunt, and everything with his deep desire for Tobirama. Madara wanted him. Truly wanted him and no one else.
Tobirama ached to seal their mutual longing with a notable bite at the alpha’s neck, as was typical for mating bites truly intended as such. With the excess of venom pooling on his tongue, his first bite would visibly scar and leave a noticeable mark on his alpha’s skin for everyone to see, a warning for every omega to heed if they didn’t want Tobirama to come for their blood as he ripped them apart.
Instead, he leaned in slowly for another kiss on his sweet alpha’s lips. Madara deserved better than to be marked like a common alpha by any off-the-mill omega.
Madara yielded sweetly against Tobirama’s lips, his bloodied tongue following the cues Tobirama offered as the metallic tang made his head swim in anticipation that would finally find fulfilment as Tobirama took Madara’s bottom lip between his teeth, carefully pulling it as he tilted his head back to look into Madara’s eyes for the moment he bit down for better or worse.
Truthfully, it was far from a reasonable place for a mating bite. Even without the thinning properties of an omega’s venom, it might bleed like a bitch for a short amount of time, but there was little blood to feed on and little circulation to spread the venom further through an alpha’s system. But this wasn’t about practicability. This was to be a statement. Uchiha had the habit of covering their necks, and most people avoided their eyes on instinct, settling their gazes on noses and lips instead. With Tobirama’s mark on his lips, no one would be able to look into Madara’s face and mistake him for anything but fully claimed. Mated.
Despite the small wound, thanks to Madara’s body already reacting to Tobirama’s venom, the first blood hitting Tobirama’s tongue was also quickly filling his mouth—a heady taste he was able to savour now that it was clear their desires aligned for this. Now that Tobirama was allowed to have this, to become addicted to the divine taste of what would become his home—and sending him over the edge. He was distantly aware of his body’s trembling, only held together by Madara’s strong arms winding around his torso before he could shake apart from the rush of endorphins and power that came with an unclaimed alpha’s blood and would forever change him, change them.
Naturally, Tobirama had researched everything that was to be found about his dynamic when he first presented, but he had dismissed any and all accounts of tasting the first mouth full of blood as romanticised nonsense. The beta blood he’d occasionally tried—a safe enough practice without his omega venom being offset by an alpha’s interested scent—had been nice enough, their blood rich in hormones and nutritious minerals but utterly bland in taste. Boring. There was no way an alpha’s blood would be any different, right?
Wrong.
Despite his deeply curious nature, Tobirama had never been reckless enough to try an alpha’s blood on a whim, and he was glad for it. The danger of setting his body on the way to developing compatibility was too great and just not worth the hassle. But even so, he couldn’t imagine anyone would ever taste as good as Madara, and he was glad he’d not taken up any other alpha on their offer. Who knows if he’d ever gotten the chance to taste Madara then? To have him, keep him, possess him?
The thought of having missed out on the opportunity to mate with Madara in any possible timeline set something primal off in Tobirama’s hindbrain.
With a growl, he let go of Madara’s lip and started senselessly mauling the alpha’s neck and shoulder—greedily gulping down the essence that would align their biology until they could join together and hnn—in an attempt to get as much of his venom into his chosen alpha, to make his scent change faster. To have him carry Tobirama’s claim in his blood as much as he’d carry it on his skin.
He was vaguely aware of the words spilling from his lips in between bites, possessive claims and dark promises, that made Madara’s dick and knot grow harder, bigger until it throbbed and Tobirama felt as if he was bloating from within, filled up by more than the steady stream of life running down his throat.
It was only the sudden realisation that there was no chance for the alpha to escape for the foreseeable future that allowed Tobirama to calm down. Rather than creating new marks, he placed kitten licks on the existing ones that kept sluggishly bleeding by the combination of his blood-thinning venom and the blood-building effect it had on Madara’s alpha physiology.
With the heady taste of blood still on his tongue and clouding his mind, Tobirama felt content. Truly, and fully relaxed. A happy purr rumbled from his chest as he continued to gently rock on his alpha’s knot, not to seek any more pleasure but simply reassuring himself of their connection as Madara held him securely against his warm and pliant body. Soft, but for the cock still rock-hard nestled in Tobirama’s cunt.
What a good mate.
Tobirama would keep him.