Archive of Our Own ^beta

Chapter Text

Whenever Emmet wakes up with a swelting feeling, it’s never a good thing. There are very few reasons why he’d be in such a condition, annoyed by how his body is betraying him, though sometimes the discomfort comes from external factors. A verrry common one being the familiar weight of his brother on top of him.

“Ingo…” Emmet mutters as he tries to free himself, but his twin firmly holds him down. The air is warm and dense with an overpowering scent, which is certainly doing its best to smother Emmet’s senses, and he scrunches up his nose in response to that signature stink.

“Emmet… Emmmmet… you smell so gooood.” Frowning mouth agape, Ingo shoves his face into the crook of Emmet’s neck and heavily breathes in like he’s trying to inhale the other. 

Only a thin blanket lies between them, not leaving much to the imagination. Emmet can’t hide or shrink away from the excessive scenting, the overbearing presence, plus that big and hard thing pressing against his lower half…

Yep. That’s a hard alpha cock all right. And his brother is definitely in rut right now, just aching to shove that thing inside him.

Not exactly comfortable, Emmet tries to free himself once more, wiggling under his brother’s tight grip. “Can I at least go to the bathroom first?”

“No.” Ingo growls and he leans down to bite Emmet’s neck, sending a clear and concise message.

Emmet winces, but he doesn’t resist. He already knows verrry well that if he struggles and fights back, his twin will just bite down harder, and he’d rather not have his throat torn out. He can tell that Ingo appreciates the submissiveness, relishing in the sight of his younger brother lying obediently under him. It’s what his alpha instincts seek out, and Emmet doesn’t have much choice but to entertain him.

He lies completely still as his brother rips away the blanket between them and strips off their clothes, leaving them both completely bare. There is nothing to obstruct their bodies, and the alpha opens his mouth wide so he can taste his brother’s sweet skin while rutting against his pliant body.

Even if Emmet isn’t really in the mood this early morning, that doesn’t matter compared to what his alpha brother wants. He shivers when Ingo’s throbbing cock brushes up against his flaccid one, eagerly encouraging him, and it doesn’t take long for his body to respond. His hole is getting wet and slick, but apparently not quite enough because Ingo reaches lower to lick the entrance and prepare it with his own mouth. The alpha’s throat rumbles with enjoyment when his nose is buried in Emmet’s thick sweet scent, and he plunges his tongue in again and again until his little brother squirms with pleasure.

When the rough tongue-fucking finally stops, Emmet breathes out a soft sigh, but he already knows what’s coming next. It’s inevitable that his brother is going to stick that unfairly big alpha dick in him and fuck him until he has satisfied his carnal desires. This is what always happens when Ingo’s rut comes around, and it’s Emmet’s duty to be an obedient partner and satisfy him. 

So Emmet bites his lower lip as a reminder to not let out any noise as his twin sinks into him. A single thrust is all it takes and Emmet feels so full. No matter how many times they’ve done this, the size of his brother’s cock during his rut is truly impressive. However, such impressiveness definitely makes it harder for Emmet to endure as he’s being railed into the bed. 

Ingo is intense and desperate for release, growling and grunting as he shoves Emmet around and vigorously fucks him with only a single goal in mind. He cannot defy those deeply entrenched instincts to dominate and breed, and Emmet just accepts what his brother has to give without complaint. Still, the younger twin’s delicate pride doesn’t let him cry and moan like his brother wants, and every rush of pleasure he feels is followed by a pang of shame.

Needless to say, being the sane one in this situation isn’t very fun. And Emmet knows he would probably have a more pleasant time if he were lost in his heat, but there’s an obvious reason why he can’t have his reproductive cycle sync up with his twin’s. They would both be completely out of control if that were to ever happen… And it’s already enough that his brother is too lost in a lustful haze to even speak coherently.

Emmet trembles and he clings to his pillow, muffling the weird sound he makes when his brother thrusts against the perfect spot. But then Ingo simply reaches over to seize the pillow and fling it across the room like it personally offended him. He intertwines his fingers with Emmet’s and pins him down, not wanting the younger twin to cling to anything else but him, and the pace and power of his thrusts increase.

Emmet doesn’t enjoy hearing his own pathetic moans, but he can’t help it at this point. He’s feeling good. His brother’s alpha dick is making him feel so good. Making his useless cock jump and sputter, making his lewd insides tighten and squeeze. But that’s not what’s important here. Right now, the alpha’s pleasure is paramount, and Emmet can feel his brother throbbing inside as the terminal comes closer and closer. The base of Ingo’s cock is starting to thicken, the increased girth teasingly catching on Emmet’s hole with every deep thrust, and the younger twin clenches down tight. Every part of him tenses up and he tightly shuts his eyes. Just a few more thrusts… just a few more……

When the knot finally pops in, intimately tying them together, Emmet cries out and his whole body spasms. His climax suddenly hits him without much buildup, like it’s being forced on him by his alpha, making his inner walls ripple and squeeze. He needs to drink down all the cum his brother shoots inside him, down to the last drop, a never-ending stream flooding his entire body. 

He’s gasping and panting when it’s finally over, but even then, they’re still coupled like this for the next few minutes. With his brother all over him, Emmet feels way too hot, inside and out. The unchanging smile on his face is flushed red as he just stares at a random wall, eyes never straying from the blank surface. 

He can’t look at his brother. It’s too awkward with how they’re knotted together, preventing him from escaping. He has nowhere to go, and if he stares at Ingo, the alpha might take it as a sign of challenge or defiance.

So he just lies there obediently, hearing a rumble of satisfaction and feeling a searing gaze on his skin. He supposes Ingo must be appreciating the lewd sight of his omega lying underneath him, properly bred and plugged up. The keen attention makes Emmet burn brighter, the back of his neck blushing and emanating sweet pheromones… And marking his pretty nape is an old scar, clearly showing who he belongs to.

Naturally, Ingo leans down and retraces that mark, hungrily mouthing the sensitive skin and stimulating the scent gland. With possessive desire, he allows his teeth to sink in, indulgently digging even deeper as he listens to Emmet’s soft cries.

Chapter Text

It started with a single bite.

They were young, behaving as typical children would. Playing, fooling around, and inevitably getting into a fight because they’re twins with similar interests and there’s only one toy train in the playroom. 

If only they’d learned to share, they wouldn’t be wrestling and rolling on the floor, trying to get a hold of each other. An unending battle with neither side willing to back down, but eventually a victor arises.

Ingo believes himself to be a worthy and rightful winner, since he is the older brother (even if only by a couple minutes), and he appreciates the sight of his twin under him, struggling and trying so hard to throw him off. There’s an indescribable rush from their little play-fight. A feeling of excitement from being the dominant brother, the one on top.

But then Emmet opens his mouth and snaps at Ingo, genuinely trying to bite him. Fortunately, the younger twin isn’t in a good enough position to actually do any harm, but Ingo is still offended by it. Apparently, pinning his annoying little brother to the ground isn’t enough. He needs to do more to assert his dominance. To finally get the other to be obedient for once.

So he decides to give a little payback. Give his brother a sharp bite and see how he likes it. The back of the neck seems to be an excellent, easily accessible spot, and there’s no hesitation as he makes his move. Even as Emmet cries out, Ingo doesn’t relent. His teeth sink in, and there’s this itching feeling, telling him to not let go. Even as his brother’s cries get louder and sharper with pain.

It only pushes Ingo further. Further in. Warmth is firmly in his grasp and sweetness seeps into his mouth, coating his tongue. A strange, tingling sensation rises from the back of his head and overwhelms him, and things get a bit blurry after that.

One moment, Emmet is immobilised underneath him, and then the next, they’re ripped away from each other. Ingo struggles against the firm hands that hold him back, confusion taking over his heart and mind. The world feels so small and it’s like he can’t see anything. At least, anything that isn’t Emmet.

Further away, his twin brother is curled up on the floor, crying and sobbing. His hands are pressed against the back of his neck, but the bloody marks still show. It looks like it hurts a lot.

And as Ingo absently licks his lips, that sweet taste recedes. Warm liquid metal permeates his mouth and sticks to his teeth, making him feel incredibly sick. His stomach does a flip. And as the bile rises up, he’s unable to hold it back.

It’s no surprise that the two of them were rushed to the hospital after that.

Aside from a toothy scar on the back of Emmet’s neck, nothing really came of that incident. As kids they were bound to do stupid things, and although Ingo felt pretty guilty about hurting his twin the way he did, Emmet was pretty fine with having a unique ‘battle’ scar. Supposedly, it made it easier to distinguish the two of them from behind. Plus, it was a fun story to tell whenever someone got curious, allowing Emmet the pleasure of teasing his big brother over it. 

Aside from that, there was nothing else to remark about the mark. 

That is, if only secondary genders weren’t a thing.

The diagnosis really shouldn’t be that nerve-racking. It’s a normal thing for everyone else, and a whopping ninety-seven percent of the population come out of it as betas. So the statistics are in Emmet’s favour, really. 

Yet it’s still a big relief to see the results, to be shown that he truly is a beta. Apparently, he has a lower-than-average pheromone output which made it a little difficult to discern his nature, but that’s hardly important! He’s satisfied with his results and he has no more questions to ask!

In contrast to him, however, Ingo ends up presenting as an alpha. A rarity, but it’s not that surprising in Emmet’s opinion. The signs were already there. Like Ingo’s booming voice, his natural inclination for leadership, and just the general energy he emanates. For a good while, Ingo was already exhibiting alpha-like qualities, and Emmet is delighted to know that his intuition was spot on. 

It’s actually kind of ridiculous that Ingo was so certain that he’d be a beta, and the fact that he’s so bummed out to be an alpha of all things would be preposterous to anyone else. But Emmet understands the uncertainty his brother must feel. As twins, they take pride in being identical, but their secondary genders evidently don’t align. From this point, they’re both going to go through some changes—big changes, in Ingo’s case—and the tracks ahead will continue to diverge. 

It’s both exciting and worrying, but Emmet is sure that everything will turn out fine. Because no matter what happens, they’ll stick together through it. 

Unfortunately, it creeps up on them when they least expect it.

Out in the forest paths where pokemon are more abundant and people less so, the twins had just won an exciting battle against some older trainers who were passing by. They’re about halfway through their pokemon journey, travelling the natural routes to the next big city, but something stops them in their tracks.

Although he was feeling perfectly fine this morning, if a little warm, Emmet finds himself unable to continue walking forward. His stomach feels… bad. It makes him wonder if he ate or drank something he shouldn’t have, yet the tingling feeling under his skin is saying otherwise. He feels sick… but it’s somehow different from normal sickness. His senses aren’t dulled. Rather, they’re dialled up to eleven and above. The world is so bright and colourful. Vast, noisy, unpredictable and unsafe, and it makes him want to curl up in a corner with some blankets and comforting scents.

There’s something verrry verrrry wrong with him, but he doesn’t know what. It makes him freeze up. It makes his heart race, and the only thing he can do is reach out to his brother. 

He doesn’t notice how Ingo stiffens up when his hand makes contact with his shoulder, nor how the older brother takes a sharp breath, nostrils flaring. 

“…Do you smell that, Emmet?”

Emmet has no idea what Ingo is talking about. Or rather, he just doesn’t really care at the moment since his stomach is progressively turning into a tumbling fireball. He clutches his middle, as if it’ll help soothe the restlessness, and he struggles to look up at his twin as he says, “Ingo, I… I feel bad.”

That at least gets Ingo to be more concerned, though Emmet doesn’t expect the other to come so close so suddenly. The air grows heavier. Tenser. And Ingo once again takes a sharp breath, his full attention on Emmet.

“Emmet… could you be… Are you in heat?”

The unexpected question takes Emmet by pure surprise and he staggers back, disbelieving. Yet the cogs in his head spin at the possibility… only for him to immediately shut them down. “No. No way. I am Emmet. I am a beta. A beta, Ingo.”

“A beta, and yet your smell is so…” Ingo is even closer this time as he sniffs the air next to Emmet’s neck, just shy of brushing against him.

And Emmet instinctively leans in, exposing his neck for his brother to access. He feels like rubbing his whole body against the alpha, letting him smell as much as he wants, letting him sense the stifling heat…

Emmet shakes his head, trying to rid himself of the strange instincts gripping him, but it’s no use. His thoughts only get fuzzier and he feels like he’s rapidly losing control. He wants it. His body screams for it. He yearns for comfort, attention, and affection… but not just from anyone.

“Ingo… Ingo, please… I- I want…” Struggling to get the words out, Emmet just clings to his brother with a shaking grip. His stomach is tied into knots and it’s only getting tighter. The heat is starting to become unbearable, and something down below feels wet and sticky somehow.

“N-no, Emmet.” Ingo places his hands on the other’s shoulders and gently pushes him back, putting distance between them. With the strained frown on his face it’s clear that he’s dealing with his own internal struggle, and Emmet’s noises of discontent aren’t helping.

“I want it, Ingo. Want you. Need you now.” Emmet stresses with building urgency, and a rush of warmth and sweetness permeates the air. It’s thick and dripping with unfiltered desire, and that’s all that’s needed for the alpha’s attitude to suddenly change.

“…Come here, Emmet.” There’s authority in that tone, plus the traces of a low growl which makes Emmet shiver. With a tightened grip, Ingo pulls the younger twin along, off the path and deeper into the forest where they won’t easily be seen. He isn’t gentle as he pushes Emmet down, asserting himself on top and huffing that sweet alluring scent for himself. His face is practically glued to Emmet’s neck, and a hungry growl builds up in his throat just before he bites down, his tongue retracing an old insignificant scar.

Emmet squeals, both in pain and delight, and everything is rapidly slipping away from his awareness. He’s drowning in the strange heat and he’s only being forced deeper by his brother’s strong presence behind him. The heady, dominating scent makes him drool with want, makes the fire inside him grow so much hotter, and he rushes to strip off his pants with clumsy hands. The air feels cool against his ass, already wet and slick with some unfamiliar substance, and it’s not long before something hot and hard grinds against him.

It’s not patient at all, bullying its way inside him with throbbing desperation, yet his body opens up to it so naturally. Emmet can’t help the pleased moan that escapes him as it jerks in, deeper and deeper. Oh yes, he knows for sure that this is what he wants, this is exactly what he was looking for, and he simply melts around it.

Things get verrry fuzzy after that. Emmet’s mind simply goes blank, and all he really remembers is the intense pleasure filling him up from the inside and the heavy scent of his brother all around him.

So he probably should’ve already known after the unspeakable things that transpired in the forest, but it still comes as a shock to Emmet that he isn’t a beta. Apparently, the initial diagnosis has the teeniest tiniest chance to be wrong sometimes because the human body just has to be annoyingly unpredictable. 

So now, the truth has come to light and Emmet has to grapple with the fact that he’s an omega. A rarity amongst rarities. Not only that, but he’s already had his first ever heat. Out in the wilderness. With his twin brother who unfortunately just happens to be an alpha… 

Truly a perfect match in the moment, but afterwards the whole incest thing hits like a freight train. Though the doctor may have assured Emmet that he’s unable to actually reproduce, that really doesn’t make the situation any better. Honestly, Emmet has no idea how long he and his brother fucked in the forest for, but from the few things he remembers, it was a pretty heated breeding session. Enthusiastic, even.

If that doesn’t already make things awkward, the fact that it couldn’t have been with anyone else but Ingo makes it even more so. Because unbeknownst to Emmet, he’s already been marked and claimed for a long while now. Apparently that little bite his brother gave him when they were kids still counts, and perhaps it even affected his secondary gender, which he really doesn’t want to think about. It’s already a big enough shock that he isn’t what he thought he was. 

And, of course, Ingo has to beat himself up over all this, basically taking all the blame for what’s happened. It’s true that he was the one who bit Emmet, starting this whole spiral that has irreversibly muddled the boundaries of their relationship, but Emmet just can’t bring himself to blame his alpha brother. No one could’ve known that things would turn out this way. And even though the younger twin would verrry much like to crawl into a hole and forget about this whole train-wreck, he can’t have his twin shouldering that burdensome guilt alone.

First and foremost, they are brothers and battle partners. And now they’re also breeding partners… which is a little unexpected, but surely they’ll find some way to manage, right? Because even if they try to avoid each other, their instincts will naturally bring them back together.