Chapter Text
Omegas cannot be great Shinobi.
That’s something Hatake Kakashi has heard ever since he was a child. A single sentence that would sting anyone’s pride, carried through rumours and back alley whispers. They were never directed at him, though. He was too young to understand what exactly it meant to be an Omega, let alone to understand what it meant to be called a great warrior and put down only because of your secondary gender.
But one day little Kakashi was forced to take in the cruel reality of the ninja world when he came home to find a cold corpse of his father on the floor.
At Hatake Sakumo’s funeral, he heard the whispers, now stronger, mocking the dead. How the White Fang of Konoha was considered such a splendid shinobi but he would never be called greater than the Three Sannin out loud. Same went for the rumours of him ever being considered for the position of the Hokage. They disappeared with the day of Sakumo’s passing.
Because he was an Omega. And Omegas cannot be great shinobi.
Kakashi knew the truth, though. He knew his father was better than anyone else. He knew that and yet his eyes stung with hot tears and he hated the people in the village for driving him to suicide. He was still young and he already knew he could suffer the same fate. So the little Hatake made the decision to prove that he’d be better than anyone, exactly as an Omega.
He found support in his teacher when he was assigned to a team. Namikaze Minato didn’t judge Kakashi for who he was but for who he’d prove himself to be. And since day one of being on his team along with Uchiha Obito and Nohara Rin, the young Hatake would do his damned best to show that he was good enough.
In the long run, it did not earn him any favours as Kakashi ended up distancing himself from everyone else, thinking that being an Omega is something he could hide forever. Minato knew of the boy’s true nature though and offered him helpful advice. During one of such private talks with his teacher, Kakashi learned about the most dreadful obstacle awaiting him yet.
Being an Omega didn’t just mean being physically weaker than those who would proudly puff their chests and proclaim they’re Alphas. Kakashi had to realise that eventually, his body would mature enough for him to experience heats that would ruin his plans of being a cold, merciless shinobi with no weaknesses.
He knew he couldn’t ignore the issue any longer when the time for his Jonin-level exam came. Despite his teacher’s reassurance that he was still much too young to experience the first heat, Kakashi didn’t want to take any chances. In the end, Minato gave in and got him the heat suppressant pills, though he didn’t trust the boy with them fully. He’d issue one dose per month, continuously reminding Kakashi that he didn’t need them yet.
But as long as the rest of his team and friends were fooled, the young Hatake was satisfied. He could avoid the unnecessary questions concerning his secondary gender and soon earned the title of a Jonin. They would stop, anyway, but not for the reasons Kakashi wanted.
Obito’s death shook him more than anything else that happened to him. On the same day Kakashi finally heard the words of someone calling his father a true hero, unbothered by Hatake Sakumo’s identity as an Omega, he was gifted with an eye that would change his life forever.
After Kakashi accepted Obito’s Sharingan, the questions whether he was an Alpha, a Beta or an Omega lessened. He didn’t know if it was pity or people thought it’d be inappropriate but he didn’t stop asking his teacher for the suppressants either. The dread hung over his head as he thought he’d eventually gain a scent that perhaps not even the medication will mask. Kakashi kept taking the pills regularly, the thought of the illusion being broken terrifying him more and more with age.
And he held onto them even more after Rin’s death. Still too young to buy them himself, Kakashi kept asking Minato to stop controlling him. He tried pleading with the now Fourth Hokage to give him full control over his own medications. His teacher would simply give him a pitiful look and remind the young Hatake that he was taking them prematurely nonetheless. But Kakashi refused to listen to reason, refused to acknowledge the fact that the sooner he’d experience his first heat, the better.
After he lost both of his teammates, he never heard the questions about his secondary gender ever again. Kakashi didn’t understand why even if it lifted some of his anxiety. He despised the fact he was born an Omega from the second he found his father dead. He never wanted to go into heat. The hatred that protected him from the true fear only grew once he was asked to join the ANBU.
By that time Kakashi’s body started developing in the ways he didn’t want to think of. He started noticing new scents to the people around him and slowly understood. He learned to recognise the dominating scents of Alphas and pleasantly neutral scents belonging to Betas. However, he couldn’t pinpoint the third one among the ANBU. He knew why, and that thought terrified him even more.
The young Hatake was too scared to ask the Fourth Hokage just why he would put an Omega in the ANBU if there was nobody else like him among the ranks. Kakashi was a rare case and he should have never made it to the special forces. Minato would reassure him it was all for his safety and he’d watch over him.
Even that promise couldn’t last forever. During the Nine-Tails attack on the village, the Fourth Hokage and his wife sacrificed themselves to protect Konoha. Kakashi was left completely alone in life, with no one to share his secret. He couldn’t understand how no one around him noticed. If anything, he was mistaken for an Alpha several times but he never corrected anyone.
Without Minato’s guidance, Kakashi could freely control his dosage. He started taking the pills every week, constantly thinking about how he would never allow himself to go into heat. He vaguely remembered his late teacher’s words on it damaging his body but he didn’t care. If anything, the young Hatake wished for death upon himself quite often.
His dreams of becoming a powerful shinobi who would prove that being an Omega means nothing were long forgotten.
Perhaps the final nail to his coffin, the thing that truly cemented his fear was when Kakashi was given the proposal of joining Root. He never wanted to have anything to do with them. And standing in front of Shimura Danzo paralysed his body with fear.
He knew the rumours perfectly well. That as soon as there were any Omegas promoted to the Jonin level, or once they’d join the ANBU ranks, Danzo would want them all for himself. He’d force them to obey him by creating a weak, one-way bond and use them against their own will.
With each encounter with the Alpha leader of Root, Kakashi feared for his life. His mind raced with thoughts on what would happen to him if Danzo found out his true second gender. In a way, he was afraid that was already the truth and the source of the other pushing him to switch his alliance was strictly due to the fact Danzo wanted Kakashi as his slave.
It never happened, however, and Kakashi stayed in ANBU now under the Third Hokage who once again took the seat, awaiting a successor. Throughout the years he managed to climb the ranks and even earned the title of the team captain. His anxiety during the team leader meetings subdued eventually as everyone around him continued to be fooled into thinking he was an Alpha.
He simply continued to stay silent on the matter and stuff himself with the heat suppressant pills every single day.
Kakashi thinks the air feels hotter than usual as he and four other ANBU members jump from one tree branch to another towards their destination. He’s once more appointed as the captain of the team and so he leads the way. One girl from the Inuzuka clan made a complaint that she'd be better at it but the Hatake silenced her with explaining for possibly the fifth time that they aren’t tracking anyone.
They don’t talk to each other, each face concealed behind a mask as they make their way. Kakashi prefers it that way, although he can swear his own breathing sounds louder than usual. He scratches his exposed arm, wondering just when the weather changed so much for him to start sweating.
Eventually, the five Konoha shinobi have to slow down, entering the enemy territory. They hide among the bushes on the edge of the forest to prepare for an upcoming fight. For now, they have the advantage of going unnoticed for now, the team member wearing a Mouse mask concealing their Chakra signature.
Kakashi swallows thickly as the warmth spreads throughout his entire body and his clothes seem to feel tighter than usual. He’d pull down the fabric from his face to breathe deeper if he wasn’t surrounded by his subordinates.
“Well, Captain?” Coyote, the Inuzuka girl, asks. “What’s the plan?”
“Let’s wait for a few minutes and use that time to count just how many shinobi there are. We’re here just to eliminate the enemy ninja, we can’t harm the civilians.”
One of the reasons an ANBU team was issued for the mission is the fact that a group of rogue Iwa nin have decided to take residence in a peaceful settlement in the Fire Country. Three reports about the intruders were enough for the Hokage to send out the Konoha shinobi to deal with the problem.
Kakashi sighs behind two masks and looks through the thick sheet of leaves and branches. The Sharingan isn’t exactly the best tool for spying in the distance but they have to make-do without a Byakugan user on the team. But he can’t focus on just looking. He blinks more often now, his mouth feels much too dry.
He’s the captain and he understands commenting on the temperature would be stupid of him but he doesn’t notice any of his subordinates sweating even a little. The leaves rustle above their heads with the gentle autumn breeze and Kakashi swears he can’t feel the wind at all.
It’s when his neck itches too much and he has to scratch his left shoulder, someone from the team finally shifts in place uncomfortably and clears his throat.
“What is it?” The discomfort is making the Hatake more annoyed than he should be and he glares at agent Mouse.
“Captain…” He hesitates with the answer and Kakashi wishes he could read the expression under the mask. All he can see with the Sharingan are two eyes darting to the side, a rather pitiful look.
“Your scent, Captain.” Coyote doesn’t feel like holding back and the noise she makes indicates her mild irritation due to her doglike sense of smell characteristic to her clan.
Kakashi feels his heart sink with those words. “S-scent?” He croaks out and his voice wavers much to his dislike.
He turns around to face his team and sees they’ve all put more distance between them. At least the ones Kakashi can sense being Alphas. His heart beats even faster and the hotness in his body seems much more obvious now. What he doesn’t understand, however, is how it could happen.
He’s been taking the suppressants regularly. More regularly than he should. Every single damn day he takes one, sometimes two pills. He has no idea why his body is now going into heat. Now, in the middle of a mission he’s supposed to be the leader of.
“You’re an Omega...?” The question comes out of some Beta’s mouth. Kakashi knows without thinking because obviously, the scent of an Omega in heat would be evident to an Alpha.
He curses under his breath and stops scratching his arms, feeling a thin layer of sweat under the clothes. His entire body itches and touching it doesn’t seem to help. Kakashi tries to swallow down his anxiety, even though he knows he’s close to crying from frustration and helplessness, feeling the strength leaving his body. He’s away from home, too far away from safety.
“T-this mission will not be compromised just because of… this,” he growls with heavier breaths. “I can return to Konoha. The rest of you deal with the enemy.”
“Are you kidding?!” Cat’s - Tenzo’s - outburst makes him flinch a little but Kakashi tries not to show that his body is getting intimidated by them all despite his strong will. “You’re in no state to go alone, Captain!”
“I’m perfectly capable of handling myself!” The Hatake cries out and quickly realises the tone of his voice. The shout does him no favours as his breathing is shaky now.
Before the discussion can go back to hushed tones and whispering voices, they find themselves surrounded by the Iwa ninja they were supposed to hunt down.
“Would you look at that, Konoha wants to chase us out with a few ANBU?” One of them barks out laughter and a second later each member of Kakashi’s team has at least two weapons pointed at them, the enemies outnumbering them.
The element of surprise is what was supposed to give them the advantage. Now that it’s lost, the only course of action is to fight. That’s what the team leader does, setting the example. He dodges the kunai knife that almost cuts into his throat and is about to deliver a roundhouse kick to one of the Iwa shinobi. Another wave of heat washes over his body and the leg he’s standing on twitches just slightly, completely nulling his attack and making him resort to rolling away.
“Wait… Do I smell an Omega?” His opponent grins deviously and jumps forward to catch Kakashi’s arm. The Hatake wrestles out of his hold but the skin where the other’s fingers touched burns and itches even more now.
Kakashi bites down the whimper that almost leaves his mouth. He loathes the looks he’s getting now - both from the enemies and his comrades. But he can hide his fear behind the hateful eyes and fighting stance for only so long.
“To go on a mission when you’re in heat… Was your plan to seduce us with that scent?” The Iwa nin that seems like the group’s leader is right in front of the Hatake in a second again. “I won’t mind falling for that kind of a trap, though.”
Kakashi spins around to get away but everything he does is slowed down in that condition. He can’t escape in time. The man closest to him grabs a handful of his clothes, his fingers digging into the back of the Hatake’s vest.
One sharp pull is enough for the fabric to cling even closer to his body and brush against his chest. Kakashi feels more heat wash over his body, especially pooling in his stomach. The soft gasp that escapes his mouth makes him blush in shame. He’s much too sensitive now, his nipples are prone to even the slightest touch now.
Once the Iwa nin catches both of Kakashi’s wrists, he leans closer, taking a whiff of his smell. He narrows his eyes and Kakashi’s legs tremble once the Konoha shinobi realises his worst nightmare is about to come true.
It’s so unlike the Hatake to look at his comrades for help. But they’re all busy with their own opponents. They’re not fast enough to save him when Kakashi is hit to the side of his neck to nearly pass out. The silver-haired Omega can only curse his nature for draining him of strength when in the arms of a confident Alpha.
“You guys finish off here, I’m going to have fun now,” the Iwa ninja says before throwing Kakashi’s weakened body over his shoulder and leaves the battlefield.
It’s less than five minutes when the Hatake is thrown on the ground. No bedding, not even a mattress. The Alpha towers over him and licks his lips. His eyes look so much darker now and Kakashi can only kick his legs a little when the Iwa shinobi crouches and puts his hands on his shins.
“I wonder what kind of a pretty face is hiding behind that mask…” He chuckles and he reaches for the mentioned item.
Kakashi’s heart is hammering in his chest but he can’t even tense up his muscles as much as he’d like anymore. The heat renders him hopeless and all he can do is keep repeating in his mind this can’t happen to him. When he’s stripped off the mask and stops being just Hound, he realises he has to control his expressions even more now.
The Iwa shinobi’s smile widens and he flashes his teeth. “A Sharingan? Oh, you must be that Hatake bastard… Fucking your brains out will feel even more satisfying.”
Kakashi doesn’t even think of how the enemies have managed to hear about him. He tries struggling but it’s no use. Three other Iwa ninja approach them to watch the show. The silver-haired man barely blinks the tears away. He can just glare at the man pinning him down with hatred.
“Now, now, don’t look at me like that. Aren’t you the one who came to me smelling so sweetly, practically asking to be fucked?” The enemy’s laugh sickens Kakashi and he wants to kick the bastard but his leg just twitches. Involuntarily, he just ends up spreading his legs, as if his body truly wants to be used.
The Iwa nin reaches for the fabric obstructing his view of the Hatake’s face fully and Kakashi shuts his eyes close when he feels the fingers brush over his mask. But before he can be exposed, everyone’s attention is drawn to a new figure on the scene.
A rattle of chains is the only sound that announces the stranger’s arrival. Kakashi opens his right eye, wanting to spare the part of Obito that’s in him. He doesn’t want to burn it into his memory, fearing it might get even worse.
The intruder wears a long, purple robe. They have a sword sheathed by their belt but don’t draw it just yet. Instead, they hold a long, heavy chain in one hand with the other end of the chain disappearing into their sleeve. Their face is hidden behind an orange mask with black markings, showing no association with any of the shinobi villages. Long black hair frames their head, falling onto their shoulders in rough cascades.
“And who the fuck are you?” The Iwa nin decides to keep his hands on Kakashi’s thighs as he whips his head around and glares at the stranger. “This is my Omega, find yourself another bitch.”
Kakashi would find it ridiculous how the Alpha’s mind mostly focuses on the mating aspect under the influence of his scent. But right now he feels an even worse, heavier wave of heat sweep over him. He lets out a pathetic whimper, looking at the stranger. He shudders and feels a weird kind of a pull when he tries to look into the hole on the right side of the intruder’s mask. Something makes him even more submissive, and he has a feeling he knows it’s a man.
The three lackeys who have come to just watch the show now draw their weapons and rush to attack the intruder when he gives no answer. The long-haired figure swiftly avoids all three kunai pointed at him and within a second his chain is wrapped around one of the Iwa shinobi’s neck. He jumps into the air, pulling sharply on his weapon of choice and the enemy’s head is ripped off his body just like that. A fountain of blood sputters from his body as it collapses to the ground.
At this point the Alpha stops just thinking about fucking Kakashi, it seems, as he rises and grabs the tanto sword he’s got on him.
“Fuck off, I said,” he growls and takes a stance. His instincts dictate that he fights off anyone who dares to approach his prey, it seems.
The stranger doesn’t spare him a glance as he just stands in one spot, waiting for another of the enemies to jump at him. But instead of stumbling when the knife goes through his back, he continues to remain unphased. The Iwa nin that’s decided to attack next simply goes through him, like he’s just an illusion. But his chain is not, and when he steps back, he throws the enemy to the ground with another pull. He lifts his foot and stomps on the Iwa shinobi’s chest with enough force to produce a painful crunching sound.
The fight unfolds in such a fast pace that Kakashi eventually opens his left eye, a part of him craving to see more of it. Wanting to see that mysterious figure fight. He can’t tell if he’s getting rescued but the fear of losing his virginity because of his body betraying him is fading away. The Hatake swallows when he feels his mouth water at the sight in front of him.
Soon all three of the Iwa lackeys lie dead on the ground and the stranger’s robe is stained with their blood. The chain drips with the crimson liquid and he slowly approaches the last man standing, the last obstacle between him and Kakashi.
Neither he nor the Iwa shinobi says anything. The Alpha forms a few hand seals and an Earth Style wall appears in front of him, thinking he can stop the intruder from ending his life just as fast as his subordinates’. But before the Jutsu can even complete itself, he coughs with blood and Kakashi curls up as he sees the spiky branch that has breached the stone wall stop just inches from his face. It’s pierced right through the wall and the Iwa nin’s body in a split second, not giving the enemy a chance to form any kind of a plan.
The wall crumbles and the branch retracts into the intruder’s arm. Now that it’s just Kakashi and the stranger left, the Omega bites on his bottom lip. His heart races and everything itches, his body is screaming at him to take off his clothes because everything burns. He takes sharp, shallow breaths and droplets of sweat run down his face. Before he can even tell it’s the other’s smell that’s making him like this, he already knows it’s another Alpha.
But unlike any other Alpha Kakashi has come across in the span of mere minutes, his presence isn’t only making his body submit. The Hatake feels his mind give in under the other’s gaze, too.
The Alpha stands in silence for a while, only observing the Omega squirm at his feet, unable to handle his heat.
“Pathetic,” he mutters in a low tone.
Obito has watched the situation unfold for quite some time. He’s remained hidden, observing as Kakashi’s team reaches the destination. Usually, he doesn’t follow his former teammate as much but today he feels something pulling him towards the Hatake. It’s when Kakashi’s subordinates point out his smell, Obito realises. It’s too late at that point and he feels intoxicated on the Omega’s scent.
The things that made him stay long enough in the past have always gone unnamed in his mind anyway. He doesn’t call them foolish names like missing or love. But for someone who’s given up on the world, whose heart is filled with hatred, he wants to spend his time on Kakashi. He’s the only one who’s allowed this treatment from Obito. Right now it simply solidates his reason to remain close.
When the Iwa shinobi attack them, the Uchiha feels his blood boil. He wants to scream that no one is allowed to lay their hands on Kakashi even though he can’t have known the Hatake is an Omega before today. He feels a strange connection, almost as if they were bonded already. His eye aches when he sees Kakashi in distress and once the enemies decide to take the silver-haired, helpless Omega away, Obito’s Alpha instincts make him leave his hiding spot.
Killing them is effortless. They’re no match for his Mangekyo Sharingan that makes their attack pointless. Obito doesn’t even use his sword, the chains are more than enough to snap their necks and crush their bones. The blood sticks to him but even that stench isn’t enough to cover up the scent hanging in the air around Kakashi.
When he comes close enough, his head almost spins. The Omega quivers with something that can be mistaken for fear but Obito can see it in his eyes. They glisten with awe and relief, maybe even anticipation. The Hatake can’t know whether the masked stranger has come to his rescue or to worsen his fate and yet he’s already acting like Obito is his saviour.
The Uchiha finds it ironic how hopeless the arrogant Hatake Kakashi has become simply because of his biology. Obito can’t control himself and he growls hungrily. He’s smelled various scents before, the scent of an Omega in heat isn’t unfamiliar to him. But Kakashi’s is so special, stronger and it awakens all the primal desires within him.
“Pathetic,” he spats out and the tomoe in his eye spin to form a pinwheel shape. He hears a whimper before Kakashi disappears into the vast space of the Kamui dimension.
Obito takes them both to another part of the forest, somewhere they won’t be disturbed. He doesn’t think of the ANBU’s team looking for their leader. It’s not his problem. His only issue at the moment is the whining, writhing Omega underneath him.
He expects a question about his identity or some sort of resistance but as he pulls down Kakashi’s black mask, he only sees the full extent of the Hatake’s begging expression. His lips are parted in quick, hot breaths that do nothing to cool him down. The silver strands stick to his forehead dampened with a layer of sweat. A deep blush spreads over his cheeks all the way down to his neck.
But it’s the eyes that truly complete the look. They’re shining with unspilled tears and look at him for mercy. Obito can tell just how much strain Kakashi’s body is under from that gaze alone.
“This must be your first heat,” he comments. “Has no one ever told you that they only get worse the longer you suppress them?”
Obito brushes his fingers over the Hatake’s face experimentally and Kakashi sobs and leans to the touch. The Uchiha doesn’t retract his hand and sees the Omega nuzzle into the glove, almost like it’s the only thing in the world that can cool down his burning cheeks.
“A-Alpha…” He whimpers and closes his eyes, spilling two tears.
“You should’ve just let it happen long ago. Now, look at you, acting like a starved bitch for a stranger. Won’t even ask me who I am?”
“P-please…” Kakashi swallows thickly. “J-Just help me…”
Obito feels annoyance build up in his chest but all of his senses are bombarded with the deliciousness of an Omega in heat. The soft breaths, the heat of the body, the sight under him. It’s not just the smell alone that makes the Uchiha bare his teeth and almost rip the black fabric with them.
“Help you?” He barks out a humourless laugh. He pushes one knee right between Kakashi’s legs and feels the already hard cock trapped under the clothes. “It’s taking everything I have to not knot you right here and now. Do you really think I’m here to help?”
“I-I need… Alpha…!” Kakashi throws his head back with a loud moan when his member is rubbed through the fabric. In that state he can’t form any more coherent sentences and teasing him only makes the scent his body releases even thicker.
Obito would stumble if he wasn’t already on the ground. He shakes his head and grabs a handful of Kakashi’s clothes. His own cock is straining against his underwear, throbbing with the need to be shoved deep into the Omega’s hole.
“You’re going to regret those words,” he groans and rips the ANBU-characteristic grey vest. The black shirt underneath follows right after.
The new sight makes him lose all reason and Obito haphazardly tilts his mask to reveal his mouth. He licks his lips like a wolf staring at a fresh piece of meat he’s about to sink his fangs into. Kakashi’s chest is just as flushed as his face and the nipples are perked up, red and hard.
The Uchiha runs his tongue over one of the buds and the Hatake sobs out a moan. Obito can see him clench his fists out of the corner of his eye but focuses on the nipples. He laps at them, licks, prods, flicks, sucks on the delicious buds. He bites down on the fair skin several times as well, nearly drawing blood. Every inch of Kakashi’s body gets him drunk even more and Obito keeps growling with satisfaction and wanting more.
The needy Omega accepts it all, now sinking his fingers into the robes the Alpha wears. He arches his back, pushing his chest more towards the Uchiha’s mouth, whimpering for more.
“You smell so… delicious,” Obito drawls out after he lifts his head and licks his lips to get even more of Kakashi’s taste off them. “I’ll be more than happy to save you from the heat.”
He chuckles lowly and places a trail of kisses down the Hatake’s stomach, though they soon turn into more bites. He can’t resist nipping at the skin, it’s like a part of him truly sees Kakashi as nothing more than prey to be devoured whole. The Omega’s reactions fuel his desires even further, each sound Kakashi produces is heavenly music on Obito’s ears.
He’s never felt so much like an Alpha before. But now he feels like he would kill anyone who dares to lay a finger on Kakashi. He wants to be the only one who sees these glassy eyes pleading for more accompanied by the quivering lips glistening with drool that keeps escaping his mouth.
But Obito doesn’t remove the bottom half of Kakashi’s clothes just yet. Instead, he places a hand on the bulge and rubs in a circular motion, occasionally giving the clothed length a squeeze. It drives the Omega crazy and he tosses his head to the side, releasing a series of sharp, high-pitched moans. More tears run down his reddened face and his legs twitch as if trying to change his fate.
Although in every aspect as far as Obito can see, Kakashi is enjoying it. His hips shake and thrust upwards, wanting the grinding to feel rougher on his cock.
“Do you think that’s all you need?” The Uchiha snorts and obliges with the Omega’s silent requests, locating the tip of Kakashi’s cock and massaging it through the layers of fabric. “You poor, poor thing. If I wasn’t so eager to fuck you deep and hard, I could take my time torturing you.”
The Hatake whimpers and closes his eyes in what could be shame. Though after a prolonged mewl rips out of his throat, he looks at Obito again and in those mismatched, half-lidded eyes the Alpha sees a hint of trust. He appreciates it but there’s a sting on envy in his heart nonetheless and he has to snarl out the next question.
“How do you even know I’m so trustworthy? What makes me different from that Iwa nin, that you were scared about him raping you but submit to me like a good bitch?”
Kakashi’s taken aback by the query. His gaze unfocuses and he looks lost, unable to rationalise his own actions. He whimpers quietly and takes a shaky breath that ends on a sob.
“I-I don’t know…” He mumbles. “Scared… Just… They know now… They all know… I’m-”
The jealousy quickly evolves into frustration, though not with the Omega. Obito puts his face closer to Kakashi’s when he feels that the fear is genuine. It disgusts him that throughout all these years, the silver-haired shinobi was forced to hide who he is out of anxiety.
They used to be friends. Perhaps in another lifetime, Obito would admit he feels bad for Kakashi. But he doesn’t deserve pity. He’s been born who he is and it’s the world that is wretched for making him feel so weak.
“So what if they do?” He sounds angrier than he should but the Alpha part of him is possessive and dreams of ripping more throats apart. “Why is being fucked by me a better thing?”
“T-they don’t know you…” Kakashi wants to curl up but Obito prevents him from moving. “If it was an enemy… I’d… I’d be ruined… O-or worse…”
“What is worse than me?” The Uchiha’s mouth is right next to the Omega’s ear now, his demanding questions quiet but dangerous enough.
“I-I don’t want t-to be Danzo’s bitch-”
A louder sob interrupts Kakashi’s answer and he opens his eyes, looking at the orange mask in front of his face. He can’t see Obito’s face because of their current position but the Alpha hears him sniffle with more tears.
The Uchiha looks back at the desperate expression Kakashi’s making. And then the Omega’s lips form the same request that suddenly carries new meaning.
“H-help me… Please…”
A storm swirls in his heart and not even a second passes before their mouths crash together. Obito takes what he wants, growling into the kiss, pulling on Kakashi’s skin violently with his teeth until he can taste the blood. His tongue intrudes the Omega’s mouth, taking in more and more of his taste. The muscle needs to taste all of the crevices, memorises the texture of Kakashi’s own tongue. His nose is so close to his skin again and he inhales the sickly sweet scent that drives him crazy.
He’s pretty sure he wants, no, needs Kakashi as much as Kakashi needs him right now. He swallows down all the whimpers and instead makes the Omega listen to his hungry growls. At this point, he’s certain that the Hatake is his and his alone. His hand on Kakashi’s crotch resumes his movements and he breaks the kiss to let them both breathe.
“Ah- ah- ah- p-please, m-more…!” Kakashi cries out when his hips thrust against his own will again. He’s close to a release, Obito can tell.
He grants him his wish by using his mouth on the Omega’s nipples again. Using his other hand, he makes sure both buds are showered with enough attention. As he sucks on one, he rolls the other between his fingers and as he bites down, he pinches as well.
Kakashi’s body spasms and he cums, soiling his underwear completely. Obito can swear he sings in the orgasm, his eyelashes fluttering as he moans softly at the peak of his pleasure. But that blissful moment doesn’t last long as the Omega tries to blink the tears away and realises his condition hasn’t been dealt with yet.
The Uchiha senses how Kakashi’s body burns in heat and he can taste the salty though strangely sweet sweat while he licks a stripe over the Hatake’s chest.
“Let’s see how wet you’ve become already,” Obito says and braces for a new wave of smell as he pulls down Kakashi’s pants and underwear in one go.
The second he sees the ass, cock and thighs all glistening with slick that’s now mixed with cum, the Alpha nearly loses all self-control. Paired up with the thick scent, the sight is irresistible and perhaps any other Alpha who’d care less would have his cock buried deep into Kakashi’s ass by now. Obito doesn’t even think of the tent he’s sporting in his own clothing.
The Omega writhes under him, quietly moaning and whining. He tugs on Obito’s clothes and blinks a few times before staring at the Alpha’s parted mouth, at the teeth peeking out, at the tongue dancing over his lips in anticipation.
What snaps the Uchiha from the trance that Kakashi’s body has put him in, is the Hatake whispering a question.
“Why are you… so… familiar…?” It sounds like he doesn’t expect an answer but it piques Obito’s interest.
“Familiar?” He chuckles as his hands now touch Kakashi’s trembling thighs, feeling the slick underneath his fingers. “Doesn’t matter.”
“That scent… I know it… Ah!” The Omega’s ponderings are interrupted by Obito shoving two fingers into his wet hole without a warning. He arches his back again and gasps loudly in pleasure.
“Maybe I’ll tell you after I fuck you,” the Alpha growls and thrusts his fingers into Kakashi a couple of times.
Despite the Hatake’s best efforts, his muscles can’t tense enough around the digits. His hole takes in as much stretching as Obito wants to do. After another shameless moan, the Uchiha feels more of the lubricant produced by Kakashi’s body coat his fingers. He pulls them out and brings to his mouth to give the slick a taste.
He shudders at how tantalizing it is. His mind already supplies him with fantasies of just tongue fucking Kakashi’s wet hole but those thoughts just make his cock throb with need even more. In the end, it’s the instincts of wanting to mate that take over him.
He finally frees his member from the confines of the clothing and grabs Kakashi’s thighs to lift them for a better position.
“Are you ready? I want to hear you sing for me even more,” he snarls and pushes the entire length in one go.
Kakashi’s insides feel so good around him that Obito immediately throws his head back and lets out a groan of pleasure. With how wet he is, the Alpha can set a fast pace from the beginning, thrusting into the Omega mercilessly. The Hatake answers his request and parts his lips to let out a litany of moans. His half-lidded eyes give Obito a lustful and thankful look and some more tears escape.
“Nngha… Aah… Aah… Yes… P-please.. I-I need…!” He can’t form a single sentence, every word interrupted by pleasurable sobs and mewls.
Obito completely towers over him as he fucks the Hatake, driving his cock as deeply into him as possible with each move. His hungry gaze lands on Kakashi’s shoulder. His mind screams at him to locate the mating gland and just bite into it as hard as possible to mark him permanently. He can’t ignore the feeling forever and thinking about how easily the Omega has given in, how he begged him for help, it makes Obito dive in finally.
Perhaps he’s followed Kakashi today with that single purpose. But whether he’s had any doubts before, now the Uchiha is completely sure he’s making Kakashi only his. He sinks his teeth into the flesh between the neck and the shoulder, closing his jaw around it. He feels the skin break, the metallic taste of blood on his tongue. He just sucks on it, humming with satisfaction. It tastes differently, sweeter than anywhere else.
He hears Kakashi scream in pain for a moment but Obito’s quick thrusting and licking at the fresh bite soon makes him change his focus. The Uchiha can give as much attention as he wants to the mark, watching a purple bruise slowly bloom under the layer of blood. But his heart stings with the feeling it’s incomplete. A proper bond requires two bites. And this is what Kakashi needs, Obito thinks. He needs an Alpha - no, his own Alpha.
And Obito already knows he’s the only one who can be Kakashi’s Alpha. No one else knows him as well as he does. No one else knows of his pain and the things he hides from the world. Obito knows he wouldn’t bear the thought of his former teammate being with someone else. He’s possessive but that’s the only way he knows how to show he cares now.
He leans close, crooks his head so the Omega has his neck exposed right in front of his face. To bring the Hatake’s focus back to reality, he slows down his movements, though still driving his cock in deep to hit Kakashi’s sweet spot.
“Ngh- bite me,” he demands, it’s not a request but an order. But the Uchiha knows Kakashi wants them to bond just as much. It’s his only salvation, in the arms of an Alpha whose identity he doesn’t know just yet. Yet the trust they’ve had towards one another resurfaces, perhaps the Sharingan making their feelings resonate stronger than any other Alpha and Omega could experience.
Kakashi whines with confusion at first but as he sees the column of Obito’s neck and hears the Alpha repeat his words, he slowly opens his mouth. He looks unsure whether he truly should do it and the Uchiha puts his skin so close to Kakashi’s teeth, he feels their touch.
“Your heat is so bad… Ugh... You need... a complete bond. It will only get even worse... If there’s no one to help you deal with it- “ he explains as calmly as possible, although he can’t halt his thrusts completely. His body moves on its own, driven by the presence of the needy Omega. “I’ll help you with every heat but I want you to be just mine. Nnngh- I won’t let anyone else fuck you, you understand?”
He finishes with a snarl again, the jealousy quickly returns to him and fuels his anger. He wants to feel Kakashi around him, wants to know he’s the only one who gets to feel him. Obito’s hands twitch, even considering just forcing the Hatake’s jaw to close around his skin. But a glint of understanding appears in Kakashi’s eyes and he muffles his whiny moans with a bite.
It’s not as deep as Obito’s mark on Kakashi’s skin but it still sends sparks of both pain and pleasure throughout the Alpha. He draws in a breath sharply and closes his eyes as it happens, feeling new kinds of emotions blossoming in his chest. They don’t feel quite like his. It’s distress and uncertainty but mostly desperate, wanton need. When the Omega is done with lapping up sweat off Obito’s shoulder, the Alpha sees a reflection of his own strong feelings in Kakashi’s eyes.
They feel each other so much closer now, so deeper and they kiss again. This time Kakashi wants to return the gesture and their tongues dance together, tasting one another in an entirely new way. They’re both filled with the desire to know the other’s body even better, lust takes over them completely as Obito’s thrusts go back to the fast, hard pace.
The Alpha growls into Kakashi’s mouth as he feels the base of his cock swell up and he tries to push the knot into his Omega with each movement of his hips. When it finally breaches the barrier of the Hatake’s ring muscles, it takes only a few more thrusts for Obito to reach his orgasm.
He throws his head back with a feral howl and feels Kakashi spasm under him as he cums with him. He paints his insides with his seed and slumps when he’s done, letting out heavy and laboured breaths.
They remain connected, Obito knows his knot won’t subdue for some time. He rests next to Kakashi and pulls him into a tight embrace before the Omega can come down from his high. His back feels almost like a heater against the Uchiha’s chest, his entire body still ablaze from the heat. The feelings of lust slowly fade out and all that’s left is the desire to keep Kakashi close, to keep him safe.
In his normal state of mind, Obito would most likely call such emotions unnecessary or disruptive but now he simply feels like an Alpha who’s just found his lifelong mate. Kakashi is his Omega to protect. He rests his chin among the silver locks and takes another whiff of the scent. His body records the smell as the most precious one, softer than the morning breeze, sweeter than wild roses in full bloom.
He wants all of Kakashi just for himself. But Obito knows they’ll eventually have to part ways, he’ll have to return the Hatake to the village. He sighs with a hint of irritation. Though he also knows that now that the Omega’s been marked with his scent, other Alphas won’t see him as easy prey.
He licks his teeth thinking about the mating bite. He’s heard that every consecutive bite on it will cause even more pleasure but for now, he thinks he’ll let it heal. Two orgasms are enough to satiate Kakashi’s needs, along with having a knot in him.
The Uchiha thinks back to Kakashi’s tears, to his worries about Danzo… Surely, the news will spread among the ANBU members. And they will reach the Root, too. He scoffs, thinking about all the ways he’d kill anyone who would ever try to use his Omega. He knows he can’t stop thinking about Kakashi as his now.
“You’re mine now,” he mutters into the Omega’s hair, feeling the need to say it out loud. He hears the silver-haired shinobi make a small sound of confirmation in return. They rest there together, both of their plans on hold for now.
An hour passes before Obito decides to put Kakashi back into his apartment. The convenience of Kamui makes it easy to sneak him back into the village without anyone noticing. And since the Hatake is in ANBU, no one will be particularly surprised he’s come back without walking through the gates.
The Uchiha rests his Omega in bed and their gazes meet, Kakashi has a clear sight of Obito’s Sharingan again. He doesn’t say anything though, just blinking slowly and thinking about the recent events.
“Now, every time you get into heat, you’ll come to me, you understand?” The Alpha says, narrowing his eye. “No one else will help you. No one else will smell that scent. Just me. Only me.”
The demand may sound impossible for someone who’s constantly surrounded by Alphas and has no other Omega to relate to. Obito softly caresses Kakashi’s hair, pitying his current life. But he’s not sure he can give him a better one just yet. He swears to make sure the Hatake is happy in the future, though. Under the light of the red moon.
Before he leaves into the swirling void, he says it again.
“And I’ll know when to find you. But you’ll know that too. Come to me, Kakashi. You’re mine.”