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Naruto loved when Kakashi was like this. Open, honest, and god-damned sexy with how much he welcomed Naruto’s touch. The way he clung to Naruto, pulling him close and licking up his jaw as Kakashi slid a hand down Naruto’s pants and squeezed him was driving him mad.
They barely noticed as chakra flowed from Naruto until said blonde was being shoved aside and another body draped itself over Kakashi’s. “Naruto,” a low voice spoke before either of them could, “we had a deal, didn’t we?”
Kakashi blinked and tilted his head and could barely make out Naruto’s face above him, staring back at the Naruto he’d shoved away. Except the one above him had red eyes.
“Ugh, fine,” the original Naruto huffed. “At least put a henge on or something, it’s kind of creepy if I have to watch you wearing my face.”
A contemplative look crossed the clone – Kurama’s – face before acquiescing, and then the clone’s eyes became a little more almond-shaped, his face losing some of Naruto’s baby-fat, and his hair bleeding into a dark red – just like his fur – and the spikes changed more into tufts resembling the shape of his tails. His body also bulked up slightly, and Kakashi watched it all with wide eyes.
“Now,” those red eyes turned back to look down at Kakashi. “Hello, wolf brat,” a smirk showed off sharp canines. “As promised, I’ll be claiming you properly this time.” The Bijuu in human form wasted no time, taking advantage of Kakashi’s state of undress for hands to caress all over, learning each curve and dip, each scar and weak spot.
“Aah, Naruto?” Kakashi couldn’t help his bewildered moan as his eyes jumped over to where Naruto was still standing.
At Kakashi’s unsure expression, Naruto smiled reassuringly, “it’s okay, Kakashi-sensei. Kurama and I already talked about this.”
“You—what?” Questions were cut off with a gasp when Kurama grasped Kakashi’s cock with a firm hand, touch sure, as if simply mapping out his territory. Sharp nails dug into Kurama’s shoulders when Kakashi felt fingers push into him. He hadn’t even realized when Kurama had pushed his way between Kakashi’s legs.
“That’s right, Naruto already agreed, and from what I remember…” Kurama drawled, fingers already prodding expertly at Kakashi’s prostate, enjoying the sight of the human below him squirming at the sensations. “You were already quite receptive to me last time as well.”
When Kakashi opened his mouth to respond, Kurama took the opportunity to dive in and lick into it, teeth nibbling on the human’s tongue. He swallowed Kakashi’s hesitant moan, using the distraction to add another finger.
Kakashi’s body jumped when he felt a second pair of hands settle on him, and the bed dipping by his head. His eyes snapped open to Kurama’s red pair watching him hungrily, and when he glanced to the side, he could see a blonde head in the corner of his eye.
“Relax, Kakashi-sensei,” Naruto crooned, running hands along his chest and sides, fingers teasingly brushing and pinching at his nipples. “Kurama told me something interesting about you… and we might have done a little bit of digging, you see…” Hands traced up to Kakashi’s throat, and splayed out there. A highly vulnerable position, a position perfect to cut off his air supply if either of them wanted to.
Fingers slowly wrapped around his neck, tightening slowly, and Kakashi could hear his heartbeat in his ears but between the hand on his throat and Kurama’s mouth on his, he couldn’t escape it. When Kurama rolled his hips against his and pushed his fingers deep, Kakashi was shocked to hear a whimper escape his throat in response. A cloud of arousal was slowly settling in his mind, fogging up his thoughts even more than usual.
“That’s it,” Kurama rumbled, pleased. “Just listen to your instincts…” He used the thumb on Kakashi’s throat to tip his neck to the side, scraping teeth over the skin exposed there, drawing a full-body shudder from Kakashi.
Quietly, he began to pour in chakra with the intent of awakening the other’s instincts that have been buried deep. With the fingers buried inside Kakashi, Kurama carefully prodded for the opening he felt the other day, and when he felt the tiniest give in the walls, he pushed chakra through his fingertips.
Naruto was startled by the sudden violent jerk of Kakashi’s body, as well as the high keen that erupted from the elder’s throat. Wide blue eyes met smug red and then Naruto turned back to stare at Kakashi’s shocked grey in awe. Naruto watched in wonder as Kakashi’s already sharper-than-usual canines grew more pronounced – though nowhere near as lethal-looking as Kurama’s – and his Sensei’s movements clumsier and more frantic; losing their usual elegant grace.
The jinchuuriki is shocked when Kakashi suddenly scrapes sharp nails down Kurama’s bare chest, drawing blood, and his mouth snaps forward; as if wanting to bite. Kurama reacts just as fast, slipping his hand from the front to the back of Kakashi’s neck, fingers digging into the short hairs of his nape, as he tugs it harshly to bare the jounin’s throat and keep him still.
Red eyes look wild with glee even as the wounds on Kurama’s chest have already healed, and the bijuu lets out a purely animalistic snarl in response, thick aura flooding the room. Kurama stares challengingly back into Kakashi’s grey eyes, a soft whine escaping the man. Legs wrapped around Kurama’s hips kick out as the bijuu continues to push his chakra into Kakashi.
Back bowing, Kakashi thrashes, expression torn between overwhelmed and confused, as his body feels like it’s no longer listening to him. His mouth opens in a choked cry as it feels like Kurama’s fingers in him are lighting him on fire from the inside. His arms reach out blindly, smacking against the warm body above his head, “Na-Naruto!”
Gentle hands grasp his own, “I’m here, Kakashi-sensei,” Naruto’s calm voice reaches his ears. “You’re doing so well, Kakashi,” and Naruto leans down, pressing a kiss to Kakashi. Fingers caress Kakashi’s in his hands, with Naruto’s other hand patting through messy silver locks. “You’re gonna be good for Kurama, aren’t you? You’re always good to us,” Naruto slips his tongue into Kakashi’s mouth, humming when Kakashi eagerly returns the kiss.
Without warning, Kurama pulls his fingers out, and then he’s rocking his hips forward and sliding his cock into Kakashi in one smooth motion. Naruto swallows Kakashi’s moan, keeping his head tilted up into their kiss. Pale hands fumble on Naruto’s skin, searching for something to ground himself with as Kurama wastes no time in starting up a solid rhythm.
A pleased purr rumbles out from Kurama as he glances down to where their hips are joined. Using his thumbs, he pulls apart the cheeks until he can clearly see where his cock disappears into Kakashi’s body. He licks his lips as he continues to rock his hips forwards leisurely.
“Ah, ah, haa…” little grunts spill from Kakashi’s lips each time he is filled and he dazedly realizes that Naruto has pulled back from the kiss. He feels Kurama hike his hips up flush against the bijuu, and then press his hands under Kakashi’s knees to push them further apart. Kakashi squirms at how easily he is being manhandled, and Kurama notices when Kakashi clenches down on him from the movement.
Another pair of hands shifts his shoulders and upper body onto Naruto’s lap, and Kakashi vaguely sees Naruto smiling down at him as the blonde nudges his own erection against Kakashi’s lips in question.
Mouth dropping open, Kakashi simply allows Naruto to gently tilt his neck further back until his muscles are protesting from the strain. Kakashi’s nose is overcome with the heady smell of Naruto’s arousal right in front of him, and his tongue lolls out with the need to taste. Distantly, Naruto curses at the pornographic image as he grips himself and slowly presses into Kakashi’s willing mouth.
His careful movements are thwarted as Kurama wickedly decides to jerk his hips in a harsh thrust that sends Kakashi sliding up the bed and Naruto’s cock straight down his throat. Kakashi convulses at the sudden feeling of the cock brushing against the back of his throat, but he has enough control to avoid biting down.
“Kurama,” Naruto scolds, slightly annoyed as he pulls back and pats Kakashi’s cheek in apology.
“What?” Kurama bites back, “he liked it.” He punctuates his point with another harsh thrust straight to Kakashi’s prostate and watches as the movement pushes Kakashi’s mouth down Naruto’s length once more. True to his word, Kakashi’s hands fly up to press against Kurama’s chest with a strangled moan, and feels the legs around his hips tighten.
Naruto sighs loudly, shooting him an unimpressed look. “Just—be careful, okay? Remember what I said.” Despite that, his own breaths are heavy with arousal as Kakashi’s hot mouth around him threatens to melt his brain with pleasure. He can’t resist rocking his own hips a little, fingers tracing the bulging throat under him in wonder. “Fuck, you’re so hot like this…”
“Yeah, yeah,” Kurama rolls his eyes at Naruto’s warning. “As long as he feels good, right? Don’t worry, I’ll make sure of that.” He can already feel Kakashi’s body grow restless, signalling how close he is. Red eyes stare in approval as he sees the miniscule movement of Kakashi’s hips rolling to meet his own, and Kurama grasps the human’s cock in reward.
A muffled groan escapes Kakashi’s throat, and Naruto echoes it at the vibration it sends up his cock. He can’t help himself as he holds the other’s face in place and starts fucking his throat in earnest. His thumbs catch the line of drool that escapes from Kakashi’s lips wrapped obscenely around him, and Naruto only moans again at the sight.
Meanwhile, Kurama holds Kakashi’s erection in his hand as he thrusts, letting the hardness fuck his own hand from the movements. Kakashi’s body begins to thrash a little and his nails score marks down Kurama’s torso once more. Kurama grips the cock in his hand harder, almost violent in the way he suddenly begins to stroke it.
An unmistakeable cry is muffled in Kakashi’s mouth as his body tenses up and he orgasms; ropes of cum spurting out to coat his own chest. His cry and spasming throat wrenches Naruto’s own orgasm out of him, and he barely pulls out in time to coat Kakashi’s face, chin and neck in his own cum.
Kurama watches, never once stopping his movements and drinking in the sight of Kakashi tipping into overstimulation as he tries to squirm away with his legs. Kakashi’s hands try to pull Kurama’s away from his softening cock, pale fingers trembling and feeble in his post-orgasmic haze.
When the bijuu doesn’t relent or release him, Kakashi’s heavy breaths turn to whines and he twists his body to try and wriggle away. Kurama uses the opportunity to abruptly pull out and turn him all the way over.
Body sagging with relief, Kakashi pants blindly into the sheets. He feels boneless, and barely registers as Kurama presses his shoulders to the sheets with a firm hand, another hiking his hips up. “You present so lovely for me, little wolf,” Kurama praises as he leans down to drape himself over Kakashi.
Struggling to drag his way back to awareness, Kakashi can only weakly bury his fingers into the sheets and whimper as he feels fingers once again slide into him. They’re perfunctory; simply stroking against his inner walls as if locating something, and then they’re gone again.
Above him, Naruto makes eye-contact with Kurama who raises a brow and smirks. Naruto glances down at where Kakashi is still limp, and reaches out to turn his head to the side to make it easier to breathe. He runs gentle fingers along the edges of Kakashi’s red-rimmed eyes. He must’ve teared up a little when Naruto was fucking his throat, and he can see that Kakashi’s lips are red too.
“Kakashi-sensei, breathe,” he says softly. He sees grey eyes trying to focus and look at him, and pats him gently as he says, “this might feel a little weird, but just trust us, okay?”
A confused sound is cut off when Kurama grasps Kakashi’s hips as he slowly, deliberately, feeds his cock back into the man. The head pops in with no resistance, and then Kurama shifts his hips, minutely drawing it out and then back in a few times as if searching. Seemingly finding the right angle, Kurama grips Kakashi’s hips firmly as he then presses in.
Eyes fly open with a shout, and then Kakashi is pushing himself up and trying to jerk away. His lower body is locked into position from where Kurama holds him still, and his upper body begins clawing desperately at the sheets. Naruto reaches for him but is beat to it when Kurama lays his entire body over Kakashi and proceeds to sink his teeth into the back of the man’s neck.
A startled cry leaves Kakashi’s mouth as sharp teeth bury themselves deep enough to break skin, and his body instinctively stills in response. His eyes are wide and his breathing comes in short, heavy bursts as panic starts to creep up. “Wha—What are you—ahh… Stop, something’s wro—ahh!”
Kurama simply bites down harder, and Kakashi is alarmed by the way his body goes lax against his own will. He wonders for a split-second what the bijuu has done to him, but before fear can set in, he hears Naruto’s voice.
“Nothing’s wrong, you’re okay, Kakashi-sensei…” Naruto tries to soothe. He sees the way Kakashi’s body had gone limp under Kurama’s bite, instincts submitting easily. Even though he and Kurama had talked about it… it was another thing seeing it. Especially given how shocked Kakashi was of his own body’s response.
Everything stilled for a beat, and when it became clear that Kakashi was no longer struggling against him, Kurama resumed his slow press into the body beneath him. He huffed against the skin in his mouth, feeling how tight the channel he was forcing his way into was. A high-pitched keen escaped the throat between his teeth, and Kurama could feel the muscles jumping; Kakashi’s instinct to survive warring with the instinct to submit.
Tears sprung up in Kakashi’s eyes as he felt Kurama’s cock enter somewhere he’d never known before. The feeling of fullness was incomparable even to the first time Naruto had fucked him. The deeper Kurama went, the more it felt like he was invading Kakashi’s entire body. Perhaps the most alarming thing was it wasn’t pain he felt… Rather, his body was firing incomprehensible signals to his brain that said he was feeling complete, satisfied.
Above him, Naruto was murmuring gentle praises and encouragements, stroking his sweaty hair, but Kakashi was lost in the sensations of his body. The fullness stole his breath away, feeling like it was splitting him open and filling him up all the way to the back of his throat. His eyes rolled back and drool leaked from his panting mouth, brain fuzzy.
It felt like an eternity later when Kurama pressed hips flushed against Kakashi’s, a loud exhale escaping the bijuu’s own mouth from the effort of holding himself back. They stayed there for a moment; Kurama steadying his breath and Kakashi trembling from the sensation of being completely, utterly filled.
Carefully, Kurama released his teeth from Kakashi’s neck, straightening up and nodding towards Naruto. The latter slides his hands under Kakashi’s chest, hooking arms under the elder’s and then picking him up. Kakashi’s face pinched as the change in position sat him firmly on Kurama’s cock, and his entire body shuddered as it crumpled into Naruto’s arms.
Naruto adjusts their position a little, until they’re basically hugging; Kakashi between both Kurama and Naruto. Naruto pulls Kakashi’s arms over his shoulder, letting him hang off him, and then proceeds to run his own hands up and down Kakashi’s torso. He slides his hands up and pinches at a nipple as Kurama starts pushing his hips up, and Kakashi clenches his eyes shut with a soft sob; overwhelmed.
The blonde runs a hand down and lightly strokes at Kakashi’s slowly stiffening erection, as he uses his nose to nudge at Kakashi’s face. When hazy grey eyes blink open, he presses their lips together, again and again in short, sweet kisses. A pink tongue licks at Kakashi’s lip and then dips in teasingly. But Kakashi isn’t all there and he struggles to reciprocate as Kurama is steadily pressing his cock deep into him with each thrust. His eyes are open but they’re unseeing; glazed over under the haze of sensations.
Kurama is growling lowly behind Kakashi, sweat running down his temple as he carefully holds back from being too rough. He can’t resist the temptation to lean forwards and lick up the pale spine in front of him though, nor can he resist littering the skin with bites and watching them bruise prettily.
Releasing his grip on Kakashi’s hips, Kurama wraps his fingers around the inside of the other’s thighs instead, pulling them back with each thrust and spreading those legs further. He feels the tremble of Kakashi’s body straining under the stretch, and buries his heavy breaths into the skin of Kakashi’s shoulder.
Naruto has his hands holding Kakashi’s face, peppering it with kisses and licking up the salty trail of tears leaking from his eyes, tongue tracing over the scar on his left. He feels through the body between them when Kurama jerks his hips harshly and then pauses. Feels as Kakashi shudders from what must be the warm release spreading within him, and then has to adjust his hold when Kakashi’s eyes widen with a sharp gasp and nails are scraping down Naruto’s back.
“Ah, n—ahh!” Kakashi wriggles futilely as Kurama roughly yanks their hips back together again, growling in warning as Kakashi’s eyes roll back. The bijuu exhales heavily as he feels his knot making itself known.
Kakashi screams as Naruto holds him in a firm embrace, his entrance expanding and tears flow unbidden as he feels like he is about to break. His body clenches onto the feeling as if savouring it, and his climax rushes through him as his vision whites out.
Each burst of warmth within him is echoed by a string of cum spurting from his own cock, and Kakashi’s mind blanks from the pleasure overloading his brain. He feels detached from his body, barely registering as two sets of teeth clamp down his neck; one on each side.
He feels wrung dry, his body riding wave after wave of highs. He distantly thinks he is going to go crazy under the pleasure. He feels teeth break through his skin again, and then something warm and familiar is flooding into him.
It seems to ground him and push him into another climax at the same time. The bright warmth is familiar as it spreads through him from his neck, and his instincts recognize it; Naruto’s chakra. Kakashi hiccups as he feels another similar, yet different kind of warmth spreading from his belly. Hotter, darker and wilder; Kurama’s chakra.
Kakashi’s body lights up from the inside, and his own chakra seems to reach out and twine with the two invading his body. Seems to test and then accept them; wrap around and welcome them inside himself. His white chakra is dyed gold and red, and then his entire body goes slack.
The devastating pleasure slowly makes way for warmth and security. Kakashi feels his body come back to him with gasping breaths, and the searing heat of four hands and two mouths on him. His vision is blurry but he can feel that they have pressed closer together at some point. His body is enveloped between the heat of both Kurama and Naruto, his limbs wrapped around Naruto and Kurama wrapped around him.
Naruto was stroking his hair still, “so good, Kakashi-sensei, you were so good for us…” A whimper leaves his lips unbidden at that, and then Naruto slowly pulls back and smiles when he sees Kakashi’s eyes on him. “How was it? Good, huh?”
“Wh—what was…” Kakashi coughed, voice rough and throat dry. He sucked in a breath when a warm palm settles over his belly, pressing slightly and causing him to squirm.
“You have a channel here,” Kurama explains softly behind him. “A womb, of sorts. Some humans evolved for it, but it hasn’t been common knowledge for some centuries.”
“W-womb?!” Kakashi would be more incredulous, but he was exhausted. “But I’m not a—”
“It’s a genetic evolution. Meant for preserving clan lines or for clans with a history of fertility issues,” Kurama interrupted.
“Wait, but… so you—” Kakashi wriggled again, eyes widening and breath hitching.
Naruto chuckles, nuzzling into Kakashi’s collarbone, “you’re not gonna get pregnant, sensei.”
When he doesn’t elaborate, Kurama does, “it’s clearly been dormant in your line for some time. I poured in enough chakra to wake up your instincts, which you already faintly presented, but not enough to activate the full effects.”
“Instincts? I thought—the Hatake clan are just known for superior senses and our affinity with canines…”
“Well basically, yeah,” Naruto snorted. “You also have sharper teeth like Kurama does and you get friskier during the full moon.”
“I—what?” Kakashi said dumbly. He never even noticed that last bit. His teeth… well, he had been a bit self-conscious about it as a child and was another reason he wore a mask, though he knew it was not really that noticeable. The Inuzuka had similar features, after all, and nobody ever bat an eye at them for it.
“It’s just remnants of breeding instincts,” Kurama explained the latter effect. “The womb makes you more receptive to being bred. Even inactive, it’ll eventually start recognizing our chakra if we fill it often enough…”
And with his voice turning sly, Kurama slides Kakashi off his cock – knot having deflated sometime during their conversation – and promptly slides him right onto Naruto’s as easily as a ragdoll. Kakashi sucks in a breath, having barely enough time to register the loss before he’s filled again. He watches Naruto frown thoughtfully before he is lifted up again – this time by Naruto, one-handed – and the blonde holds his cock steady as he feeds it back into Kakashi.
He gets it in one go, sliding straight into Kakashi’s… womb, and the silver-haired man throws his head back, electrifying pleasure surging through him once more. He pants, head landing on Kurama’s shoulder, and his vision goes hazy quickly when Naruto starts bouncing him on his lap. Each thrust elicits a soft sound from Kakashi, and he whimpers when Kurama nips at his ear and then tilts his head to claim his mouth.
“You’re so beautiful like this,” Naruto pants, fingers bruising pale skin as he grunts at the tightness of the channel. “Bet you’d be pretty if we knocked you up for real too, wouldn’t you?” Naruto licks a trail of sweat running down Kakashi’s chest, bending to suck on a nipple and getting Kakashi’s nails digging into his back in response.
“Oh? Do you want that, wolf brat?” Kurama teased at the reaction. He rubs a hand on Kakashi’s belly, pushing it down to feel the faint outline of Naruto’s cock moving within. “Want to be swollen with Naruto’s child? Our child?” He growls, licking over where his teeth had broken skin and laving on the dark bruise there. “I could do it, you know,” he presses harder on Kakashi’s belly, pushing chakra in.
Kakashi arches as chakra floods into him, and his cock twitches, spitting out a weak spurt of cum as he sobs. Kurama continues, “I can wake up this part of you any time…” he rubs his cock against where Kakashi and Naruto are joined, startling a gasp from Kakashi. “Fill you up good until you’re heavy with our child…”
“I… I can’t—” Kakashi shakes his head, twisting to shoot a desperate look at Kurama that has the latter huffing and retreating. But before Kakashi can relax, a finger slides in next to Naruto’s cock, and Kakashi clenches down with a cry.
“Maybe not today, little one,” Kurama concedes. He hungrily laps up the cries and moans tumbling from Kakashi’s lips. “But one day… you’ll take us both. I know you can do it,” Kurama licks at the tears flowing from Kakashi’s eyes as Naruto continues pumping into him, the squelching sounds echoing lewdly in the room. “You’re our mate, after all.”
Kakashi grips fingers in deep red locks and pulls, biting at Kurama’s lips as they kiss, and he feels the bijuu’s pleased growl vibrating through his tongue. Kurama wraps a hand around Kakashi’s throat possessively, devouring him.
Across them, Naruto groans at the sight, unexpectedly arousing and he grits his teeth as he chases his completion. He spreads fingers across the globes of Kakashi’s ass and pulls their hips close, shifting his legs for better balance and then driving in forcefully. He sees Kakashi’s body tremble under the pleasure and the way his fingers grip tighter onto Kurama. The legs around Naruto’s hips squeeze in response, and Naruto pumps in once, twice, three times and then shouts as he comes.
Pushing his hips all the way until they’re basically crushed together, he sighs as he releases into Kakashi’s warm body. Feels the way Kakashi’s hole flutters around him and strokes his cock as it dribbles out a few last drops of cum.
Kurama has his hands wrapped around Kakashi’s face, tongue claiming his mouth as the latter goes slack in his arms. This time, Kakashi doesn’t rouse as easily even as Naruto slowly pulls out and they both arrange his body to lie between them. Kurama only chuckles lowly as he makes a comment about the human being “cock drunk” as Naruto pulls Kakashi close and pulls the covers over them.
Tucking Kakashi’s head under his chin, Naruto presses his lips to silver-grey locks and wraps his arms around his waist as Kurama presses up against Kakashi’s back. Sneaky fingers trails down pale skin, mapping bruises and marks, down the swell of his ass and then slips cheekily into the wet cavern.
A soft whimper is all it elicits – and a sharp look from Naruto – as Kurama gathers some of their spend and pushes it back through the inner opening. The opening stays tight around his fingers, holding everything in as he leaves them there.
Still unable to find his voice, Kakashi only shudders and curls closer to Naruto, pressing his face into his neck and letting his eyes droop close from exhaustion. Under the blanket of their combined chakra, and the faint traces of it thrumming from inside him, Kakashi falls into a deep slumber.