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adeptus pussy really breaks a mf

Summary:

The dynamics are exclusive to the adepti, elusive and mysterious creatures as they are, and she’s sure it must be the case. Xiao is an omega, and one in heat, for that matter. She didn’t put much thought or research into the concept, but it’s the only conclusion she arrives upon once considering all the facts. After all, Xiao is a warrior, disciplined and stoic — he wouldn’t fall prey to the mortal coils of lust unless, well, his biology essentially forced him into such a position. Of course, now that she’s sure she’s identified the solution, she now has to figure out what the next step is.

Anyone who didn’t want to be brutally murdered by a very angry Yaksha would almost certainly turn back, go to sleep, and pretend as if nothing happened once morning arose.

-

or: futa lumine fucks boypussy xiao. who is an omega in heat.

Notes:

well, it seems i really can’t finish smut unless it’s done all in one big spurt of inspiration. anyways, i wanted to appreciate lumixiao along with aexiao, since they’re pretty much the same ship, but i cannot write anything het besides femdom lmao. just regular kink stuff ig

(See the end of the work for more notes.)

Work Text:

When Lumine awakens in the dead of night, it’s to a sickeningly sweet stench flooding her senses.

 

Blinking groggily, she crawls across the tent floor and quietly pulls open the flaps at the entrance, careful not to startle any of the others out of their slumber. Whipping her head around, she scans every inch of her surroundings in an effort to identify the fragrance — however, she is only greeted with quiet snores and the flickering dance of fireflies. Barbara and Bennett’s respective tents are exactly as they were when Lumine last saw them, so clearly the two haven’t wandered off or done anything to prompt such an intense scent. Curiously, her eyes dart to another ramshackle tent much further across the grassy plain, zeroing in on the dim glow of a lit lantern.

 

Taking care to avoid stepping on any branches or dried leaves, Lumine slowly approaches Xiao’s sleeping area. The saccharine aroma becomes progressively more concentrated, as if a field of Whopperflowers had made the clearing their home. However, the scent isn’t exclusively treacly — hints of other natural smells are present, though certainly not unpleasant to the senses. She manages to pick out undertones of Qingxin, Violetgrass, and Pine sap all before the noises start too.

 

Soft panting is clearly audible, and it almost makes Lumine instinctively draw her sword and swing wildly around her until she recognizes it coming from the tent. Some tiny voice of common sense is screeching at her to leave it and go back to sleep, but if she had all that much common sense, she wouldn’t have defeated a giant dragon for a city full of people she barely knew. Continuing onward, now bursting with (surely misplaced) determination, Lumine is all the more encouraged to investigate the unusual scent and sounds.

 

She promptly freezes when a shrill whine comes from Xiao’s tent.

 

Now there is even more curiosity fueling the determination, because that was almost certainly Xiao’s voice. The raspiness is unmistakable, to be sure, but the breathy desperation was certainly new. Anyone could see that he’s pretty conventionally attractive, but she’s been so occupied with her eternal search for a certain missing brother that she hasn’t exactly had the time or energy to consider… that sort of thing. Or to view anyone else in that sort of context, for that matter. Especially not someone as prickly and hostile as the Vigilant Yaksha, who seems like he’d coldly brush her off if she even extended the offer. Would a guy with that kind of personality really be masturbating in the dead of night, only a short distance from his fellow party members?

 

Maybe. Maybe if he was that desperate and that deprived. Maybe if he was—

 

Ohhh.

 

Lumine is really starting to consider if she’s stupid, especially when the answer was so incredibly obvious.

 

The dynamics are exclusive to the adepti, elusive and mysterious creatures as they are, and she’s sure it must be the case. Xiao is an omega, and one in heat, for that matter. She didn’t put much thought or research into the concept, but it’s the only conclusion she arrives upon once considering all the facts. After all, Xiao is a warrior, disciplined and stoic — he wouldn’t fall prey to the mortal coils of lust unless, well, his biology essentially forced him into such a position. Of course, now that she’s sure she’s identified the solution, she now has to figure out what the next step is.

 

Anyone who didn’t want to be brutally murdered by a very angry Yaksha would almost certainly turn back, go to sleep, and pretend as if nothing happened once morning arose.

 

Anyone who was fucking intelligent would do so.

 

But sadly, the temptation of seeing Xiao in such a vulnerable position is too tantalizing. Lumine feels like a dog following a bone on a string as she continues on her trek towards the tent, sweat dripping down her brow. With every quiet moan and whimper that breaks the silence of the clearing, she becomes increasingly horny, and she starts wondering just how long it’s been since she experienced any sort of physical pleasure. She could at least get off to being beaten up daily by Hilichurls if she were a masochist.

 

Despite every step feeling like a slow descent into Hell, Lumine is now at the entrance of tent, idling around like an idiot. Not confident enough to barge inside nor smart enough to turn back. If Xiao notices her presence, he doesn’t make any indication of that — however, the aroma is at its strongest, which confirms her suspicions that he is experiencing a heat. She practical salivates of the thought of a shivering, brainless Omega, eager for physical contact for anyone who will give it to them. Okay, that sounds really fucked-up and creepy of her, but… she did kinda help save the city he’s sworn to protect, so maybe it can just be considered payment? She’d be lying if she said she wasn’t tired of being taken, taken, taken from, never given anything in return. Mora and talent books are nice, but they start to feel like a distraction after a while, as if everyone thinks that occupying her with trinkets means she won’t bother them with lost-sibling issues.

 

A surge of frustration rises in her, and now she’s impatient. Physical pleasure, fleeting as it may be, would be a fitting way to relieve her stress at the moment. Why should she have to shoulder one more burden for everyone else’s sake? And Xiao is powerless to resist, because he’s craving just as much as she is. It must be fate laying out a reward for her, as if to say, “you’ve worked hard enough. You can have a treat now.” Even if it isn’t, well, she thinks she deserves it after all she’s done for other people. Having fully made up her mind, she flips open the tent door, and the sight is just as tantalizing as she imagined it to be.

 

Her eyes dart around the scene, not sure where to direct her focus first. Xiao is trembling on his sweat-soaked sleeping mat, glassy eyes just barely registering her presence. Various bits of clothing have been discarded, as if he attempted to undress but found himself too disoriented to complete the grueling task. To her surprise, he manages to grit his teeth and push himself up, pulling his blanket over himself.

 

“Traveler,” he breathes out, panting quietly. “You should — you should not see me… like… this…”

 

“Are you — are you in heat?” she dumbly stutters out in response, standing stiff as a board. Thank God Xiao isn’t fully lucid as he is now, because he would certainly recognize the sheer idiocy of the question. Yes, Lumine, of course he’s in fucking heat.

 

“I-I,” he stammers out, curling his folded legs closer to himself. He appears smaller than ever, weak and boneless. “It hurts — no — just leave, you shouldn’t…” Clearly, he’s conflicted between asking for help and maintaining his pride. She slowly kneels down, placing her palm against his forehead, feeling the blazing heat against her skin. He shivers at the motion, leaning in ever so subtly to the touch.

 

Oh,” she whispers, pausing for just a moment before moving in like a rabid animal. She practically rips away the blanket, exposing his bared lower half. Xiao wails in shock and displeasure, but is clearly not making any move to resist.

 

A soaked cunt leaks onto the sleeping mat, practically suffocating in its own slick. The swollen clit resting at its head indicates that it has been played with, and Lumine has no doubt of what Xiao was doing earlier now. She is now at the very source of the overpowering fragrance from before, and it’s practically an aphrodisiac, beckoning her to come hither. She’s stuck on what to do first, equal parts desperate and eager to try just about — everything. And Xiao, well, in still in his bedridden state. He seems ready to accept her ministrations, although she assures herself it’s because he wants it and likes it, and not just because he’s too weak to resist. After all, she’s read that pleasure is amplified for omegas in heat.

 

“Were you touching yourself earlier?” she questions, voice a low murmur. She pulls Xiao’s motionless form towards her, the only indication of him even being alive the shallow rise and fall of his chest. He is positioned to rest against her chest, giving her full access to his body. And Archons, what a body it is.

 

“No,” he cries quietly, flushed pink all over. It’s even more obvious with his pale complexion. “…Yes. It — it hurt.”

 

“Poor baby,” she purrs. She’s going to have to think long and hard later about where all this confidence is coming from, because God knows she’s usually all stutters when it comes to flirting, much less sex. “You want someone to touch you down here? Or maybe more?”

 

“Please, please,” he keens, squirming in her grasp. “Touch me.”

 

“Touch you where? Be specific,” she responds curtly, delighting in his blush deepening.

 

“My,” he pauses, stopping before he can get the words out. Is he embarrassed? Lumine is captivated by this obvious change in demeanor. He’s shockingly adorable like this, desperate and flustered. Is it bad to want to keep him like this forever? “My p-pussy. Traveler—“

 

She plunges her fingers inside, mouth curving into a slight smile when he twitches and moans. He’s practically sobbing at this minimal stimulation, and it makes her wonder how he’d react to more intense forms of contact. Well, the night is still young. Even if she certainly won’t be able to cross every check off her kink list, she’ll be damn sure to get in as much as she can.

 

“Ah! ♡” he whimpers, and she snaps back to alertness. She’ll take it slowly at first, ease him into it. “Ggh… oh, it’s so — Lumine, more, more, please!” Conceding to the request, nimble digits begin to thrust back and forth, coated in translucent slick. The inner walls of his entrance are warm and soft, practically inviting anyone inside. Well, she certainly won’t refuse that invitation. Rubbing against the plush surface, thoroughly exploring every sensitive inch of skin, she’s captivated as Xiao is further tangled in the throes of lust. He pants helplessly in her arms, body racking with silent sobs at the pleasure delivered upon him. She’d never say it so his face, but certainly an improvement from his usual frigid self. Hopefully this won’t be her last chance to see him in this state.

 

“Pretty,” she whispers, observing how the praise spurs him on. She doesn’t mention how he’s just pretty enough that she wants to break him, watch as he shatters into a mindless plaything. Okay, moving a bit fast for their first time together, but Lumine is tired of being patient. Maybe she just wants to claim something for herself. Hopefully Morax won’t mind if that something is his cute little servant; dragons tend to be territorial, after all.

 

It is about now that Xiao finally notices her raging boner pressed against his back. Blinking rapidly, he shifts upward and turns around to face her, although his focus is anywhere but her eyes. Mouth practically watering, he slowly extends his hand towards the bulge concealed beneath her skirt, and she is completely entranced by the motion. To see calm, collected Xiao be so hungry for cock must be one of the Seven Wonders of Teyvat, because she’s certain the image is now burned directly into her brain. Probably as jerkoff material for the rest of her lifetime, but still definitely a core memory. Smirking a little to herself, she draws her skirt up and flings her panties away, letting her dick pop out with little fanfare.

 

“Oh,” Xiao whispers, mouth in a perfect circular shape. He takes in the sight as if it were an artist’s masterful painting, clearly in awe of the size and appealing shape. Not to brag or anything, but Lumine can at least recognize she has a nice dick, okay? He seems to be stuck between sucking on it, touching it, or just skipping past all pretenses of foreplay and riding it until the sun rises. She’s not sure she would complain no matter what, but she’s not feeling particularly patient at the moment.

 

“Darling,” she pants out, shifting uncomfortably, “I love you, but you’d better do something or I’m seriously just going to go ahead and fuck you into the sheets.”

 

As if it were the most natural thing in the world to do, Xiao leans back, presenting himself with almost comical enthusiasm. “Just do it, then,” he hisses out, eyes watering. “I’ll take anything — so just—“

 

Okay, now Lumine really can’t hold back. Why should she? He’s clearing asking — no, begging for it. Sure, his thinking is slightly impeded by his heat, but Xiao is certainly headstrong enough to recognize what he does and doesn’t want! Besides, although Lumine would never admit it to herself, she doesn’t particularly care if he wants it anymore. All she knows is that he’s tempting and available, and the little minx is dripping with need (among other fluids). Taking the opportunity as well as relishing in the yelp from the boy, she slams him flat against the ground and grabs the soft back of plush thighs, pushing them up to his shoulders. Her cock makes contact with the velvety pussy beneath it, rubbing against the outer walls and raw clit.

 

“I really never thought I’d see you like this,” she huffs, not wanting to get carried away and immediately plunge in. Even with her current impatience, she can still have a modicum of restraint.

 

“Like what?”

 

“Like a whore,” she whispers, watching him pout and tremble at the degrading comment. It only serves to encourage her, and she wonders how far she can go with this. “You’re wet and desperate for me, so don’t even try to deny it. Honestly, you’re lucky I came to help you before anyone else did.” Grinning wickedly, she undulates her hips with a steady rhythm, dousing her dick in his fluids and preparing it for entry. “Or would you like that? You’ll let anyone fuck you when you’re like this?”

 

“‘M not that desperate,” he mumbles in response, although his catlike eyes widen when he realizes the implication of his words. Lumine hums, pleased at the reassurance. He only lets out a flustered huff of breath, breaking eye contact. “J-Just move already, would you—?”

 

“Well, if you insist!” she chirps, eagerly slamming inside with little pretense. His eyes bulge out of his skull, yelping at his sudden fullness with a sharp buck of his hips. Fortunately, in the mating press, he’s not given much room to escape or regain control. All he can do is take it.

 

“Oh—!! Lumine, Lumine, you’re — it’s, uhn, ough, ohh, you, hngh! ♡” He twitches with every rough thrust of her hips, plunging in and out of that enveloping heat. She grits her teeth, determined to bring them both to the height of their pleasure. Archons know it won’t be hard, with how deliciously his whorish cunt is pulling her inside. Finally, her urges will be satiated — finally, she won’t have to fight to have something all to herself. She can just take, and although that single bout of selfishness is a sin, it’s also incredibly rewarding in and of itself. A squirming adeptus beneath her, eager for her touch and affection; now, would she have that if she’d been a good little girl and tiptoed on back to her tent? Obviously fucking not.

 

“Archons, Xiao, you feel so good. You wouldn’t do this for anyone else, huh? Right? Not even Morax?” she rambles, practically delirious with pleasure.

 

What—? Don’t talk about — my lord in such a vile—“ His sentences are choppy and breathless, which makes it clear she’s doing a good job. Unfortunately, his full submission isn’t quite there just yet.

 

“It doesn’t matter anymore,” she snaps, thrusting forcefully. Their bodies jolt with each movement, intertwined in a passionate display of debauchery. “You’re mine. Mine. I won’t — let anyone else have you now..!”

 

“Yours — oh, but I can’t — nnh..! I have a contract with — with — whh, mmnh! Slow, slow down, you’re… hgh! ♡♡ Ah, oh, ough…! ♡” It’s such a wonderful treat to hear him still try to sound imposing and authoritative that she completely ignores the request — in fact, she probably continues on even harder, swinging her hips in broad, pendulum-like slams. Although his reactions clearly indicate immense pleasure, she’s sure he would enjoy anything no matter what. His body continues gushing out slick, further easing her entry.

 

“You’re so cute,” she breathlessly giggles, watching his expression contort with the overwhelming stimulation. “Just wanna keep you like this forever. Put a collar on you. Keep you like a — fuck! — pet.”

 

Possessiveness flares in her chest, despite being entirely undeserved. Who would she be, to lay claim to Xiao? A mere traveler, subjugating a mighty adeptus? But she is once again reminded of the fact that she saved Mondstadt, she saved Liyue, she expends all her energy running around fucking day and night helping anyone who asks for it. Beat a giant dragon, beat an oversized rabid dog, beat a redhead with a murderboner, beat a water-snake-serpent-thing! She deserves this, to reward herself with nothing but utterly selfish desires in her heart for once in her life. Xiao is irresistible right now, simply because he himself can’t resist. Lumine needs this — someone who will unquestionably surrender to her whims, instead of the other way around for once.

 

“Mmnoo,” he uselessly whines, drooling all over himself. “Icann’t… more, more, ggugh…! Oh, Archons, c-can’t, so — so—“

 

“You can,” she responds bluntly, before devouring his mouth in a sloppy kiss. Her tongue dominates the embrace, writhing in the damp cavern as if her goal were to thoroughly consume him. Pulling back, a string of drool connects their lips, dripping absently onto his damp chest.

 

Ah. Damp chest?

 

“Are you really—“

 

He’s fucking lactating. Archons help her.

 

“Oh, baby,” she purrs, grinning widely. “Your body is so — eager. Already preparing for me to breed you, so fucking cute. Okay, fine, if that’s what you want, I’ll give it to you.” True to her words, she slams in deeper, battering against the entrance to his cervix.

 

“Oh..!” he mewls in surprise, back snapping into an arch at the contact. “N-no!! It won’t go in, it won’t, mmcan’t — you can’t get me—“

 

“If you don’t want it, then just what is this?” she croons, lapping against a milky nipple. He can’t help but purr at her mouth taking his breast, drinking in the creamy liquid. It tastes like the rest of him, like divine nectar. She switches between each nipple until both are puffy and rosy pink, bulging out and leaking. “Your brain is heat-stupid, but your body knows what it wants. To get fucking,” she punctuates her words with a powerful thrust, “bred,” and another thrust, “like a sweet little omega bitch.”

 

He sobs, salty tears running down his reddened cheeks. He’s clearly being driven to madness, from a mixture of her simultaneous cruelty and gratification. Although she’s not all that surprised due to his devotion to his (former) Archon, the poor boy is desperate to be wanted, to be praised and pleasured and showered with affection. The two are almost tragically intertwined, by way of their own desires — they could feed off each other like endless sources of energy, taking all the approval they need from each other. Lumine will revel in his submission, and he will take her dominance as a sign of her wanting for him. Such a perfect arrangement, such a perfect toy. She really will claim him if this goes on.

 

Seeing no more point in hesitating, she completely dismisses any of Xiao’s admissions and slams past the head of his cervix. He yowls in pain, although he obviously also enjoys it, if his eyes rolling into the back of his skull is any indication. His formerly flat belly has distended, the lump of her thick cock inside him forming a small protrusion. She can’t help but rake her eyes over the vision before her; the small boy is twitching and jerking slightly, expression informative of his cock-hungry brainlessness. All protests and resistance have completely vanished; he only drools absently, cunt pulsing around the dick inside him as his nipples spray copious amounts of sweet milk.

 

“Hm. Seems I’m inside your womb now,” she hums, gazing down upon him as before, though an air of superiority seems to radiate from her now. “Feeling good?”

 

Gguh,” he blankly responds, unable to muster the intelligence to formulate a sentence. A prime example of being truly fucked stupid. “Deep. My womb… y-you… ♡♡”

 

She resumes roughly pounding inside, his walls spasming around her. Xiao himself squeals in delight, tongue lolling out of his mouth. It excites her to be reminded that he would never act like this normally, that only she is able to witness his heat-addled self at the moment. She leans down to suckle at his leaking tits, gulping down more creamy fluid as a seemingly endless supply spurts out. It’s as if his body is progressively becoming more tailored to her desires, priming itself to be bred and fucked day and night. Well, if that really is the case, she’s not complaining. Planting her virile seed deep inside is exactly what she intends to do.

 

“Ah, ah, ough! ♡ Lum—ine! Mmgh… bre—ed, breed, buh, huah, oh!! ♡♡” he sobs, arching into her thrusts.

 

“Yeah, I will, I will,” she pants, groping the smooth flesh of his thighs in her grip. “‘M gonna make you mine. Cute little omega wife. Mine, mine, mine — not Morax’s—“ She can’t help but continue blathering on, although Xiao doesn’t seem to mind. If anything, she’s certain the degrading dirty talk is spurring him on. “Gonna breed this cute little pussy. Pregnant and full of babies — tits swollen and leaking — fuck! Archons!”

 

When she cums, she cums hard. Seed blossoms against the walls of Xiao’s womb, sending his eyes rolling into the back of his head once again. He twitches at the sensation of liquid filling him, his body being used as a receptacle for Lumine’s semen. Her cock slides out with a wet pop, releasing her iron press on him and flopping back onto her ass. She pants briefly, vision blurry from physical exertion, before directing her gaze back to the fruits of her labor.

 

Cum is leaking out of his pussy, globs of white cream soiling the sheets. The harsh spray of his milk has died down to a weak trickle, although wet stains have still formed in the fabric below. He stares off into space, eyes empty and glazed-over, although a weak smile is plastered across his face.

 

“Breed,” he mutters dumbly, drool leaking at the corner of his mouth. “Nnmgh. ♡♡”

 

She huffs out a small laugh, casting once last glance over his ruined composure before pushing herself onto her feet. She wobbles slightly, disoriented and dizzy, before fully straightening up and brushing her skirt over her softening arousal.

 

“Let’s do this again.”

 

She leaves the boy to recover, knowing that this won’t be the last time this happens to the two of them.

Notes:

dom lumine is an aesthetic all by itself i honestly love it so much and idk why

i made a twitter !! go follow me if you’d like, i know i’m not a super prominent genshin writer but i need someone to listen to my rambling lmao