Work Text:
Kaeya took great pride in his position in the Knights of Favonius and always made sure to carry out his job in the most appropriate way possible because he wanted to feel worthy of carrying the title of Cavalry Captain. Even though he sometimes found it amusing to purposefully test the Acting Grand Master Jean's patience, or sometimes his playful personality showed a little too much, his output was still exceptional. He could handle just about anything and still finish his job perfectly.
Even a very keen and very sensitive Fatui sitting on his lap and slowly melting into a trembling mess. He was sure enough he could handle that, so much that he himself was the one who'd called Childe over, he was the one who'd slightly suggested that Childe sit on his lap even though — and especially because — he knew how easily teased the other man could be, he was the one who'd moved in all the right ways to cause the slightest pleasurable sensations in Childe… And then he just waited for the results while he rewrote and reviewed the paperwork Jean had sent him.
Kaeya had actually finished all of his backlogs about twenty or thirty minutes after starting his activities with Childe, but he didn't want to cut the fun in half so he kept pretending he was still working.
His chest was tightly pressed against the other man's chest and each breath either one of them took made them press even harder.
“Kaeya…” Childe whimpered, slowly grinding his crotch against the blue-haired man's thigh and lowering his mouth to kiss his neck. “Please, I want attention. Pay attention to me.”
He felt Childe close his mouth against his skin and begin to suck slowly, still grinding back and forth repeatedly on his thigh. Kaeya was human so that obviously caused a reaction in him, but he pretended to be unaffected even as the heat continued to build between his legs. He had a goal in mind and oh, he wasn't going to give up on that goal.
Without warning, Kaeya slapped the flesh of Childe's ass and yanked his head back with a firm grip on his hair.
"I believe I gave you a very clear instruction earlier, didn't I?" He said and watched as Childe's blue eyes practically exploded into a darkness of desire and lust.
“Yes,” he answered through a heavy breath.
"And what was that?"
"I can't interrupt... I can't interrupt the sounds I make because you want to hear them."
“That’s right. So don't cover your mouth.”
“But I want attention,” Childe ground his hips once more for emphasis as he spoke in a pleading voice. "Please, Kae, please."
Kaeya purposely remained silent for a few more seconds, just allowing Childe to sink further into the mess he was becoming. Tartaglia's head fell back with a low moan and his breath stuttered. Kaeya looked right at his exposed neck and he knew just how soft that skin was, how warm it felt against his own hands and lips.
He was probably just as eager for more as Childe was, but Kaeya had always been a teaser by nature. He liked the thrill of making someone a mess and hearing them beg or sound desperate before finally giving them what they wanted. He liked the feeling of power it gave him. He thrived with it.
"Ok. Since you're asking so kindly I can make a concession. Take off your pants,” Kaeya ordered.
The other man got up and did it in no time, carefully doing what was ordered but not slowly at all, exposing his long legs and hips quickly. Then Kaeya had a lap full of a smug, nearly naked Childe looking at him with pure expectancy in his eyes.
The blue-haired man touched his fingers to Tartaglia's belly, just below where his shirt ended. He slowly traced a path down, toward the other man's groin, and rubbed slowly just on his clit first. Childe moaned and ground harder than he had so far on Kaeya's thigh.
“Oh, well,” the latter said with a little snort. "I can feel how wet you are already through the fabric of my pants."
Tartaglia was panting lightly. He hugged Kaeya's neck and moved close to his ear to faithfully obey the orders he had and allow the other man to precisely hear each of the lewd sounds leaving his mouth.
“This is because of you. You did this,” Childe whispered while he was still grinding down and Kaeya smirked. He slowly massaged where his fingers could touch and spread the wetness all over Tartaglia's cunt, marveling at the squelching sounds it was making.
"But I haven't even done anything yet."
“You bastard, you— ah,” Childe cut himself off with a groan as Kaeya pressed harder into him, and now he hugged the blue-haired man almost desperately, almost as if holding for dear life.
"Were you saying something?" He removed his fingers with a wet noise and Childe immediately whined at the loss. Kaeya lifted his hand between the two of them and placed it directly in Childe's line of sight. "Look what a mess you made, you nasty slut."
His fingers were coated in Childe’s wetness and they were practically glowing from the large amount of it. Kaeya's eyes zeroed on it. He was throbbing with desire but wouldn't let it show.
Childe sat up straight and grabbed that one hand of Kaeya, slowly bringing his long, now wet fingers into his own mouth, engulfing them all at once without any trouble. He sucked greedily with his eyes closed and his tongue moving perfectly and swiftly, and then he opened his eyes and looked directly down at Kaeya before removing his fingers from his mouth, leaving a trail of saliva between his lips and the fingertips.
“I cleaned up my mess,” Childe said in a very innocent yet very feign voice. "Do I get a reward now?"
That's what turned the heat inside Kaeya into pure, unyielding fire. The urge to throw Tartaglia on his bed and fuck him roughly into the mattress until he was so oversensitive he'd start crying in pain was unbearable.
I'm not done with the teasing yet, Kaeya thought and took a deep breath to get his thoughts in place.
“I still have some work to finish,” lie, “you sure can wait a while, can't you?”
Childe whimpered, clearly unhappy, but laid his head on Kaeya's shoulder anyway, breathing heavily directly into Kaeya's ear. He couldn't keep his own hips still, which caused occasional rubbing movements against Kaeya's thigh, and his pants were already fully soaked from that. Which was pleasing the blue-haired man to no end.
“I can give you a little treat if you want,” he suggested.
"What is it?" Childe asked, sounding much more excited now.
"I'm going to put my fingers inside you and just leave them there so you can keep them warm, what about that?"
“Please, Kae, please,” Childe turned and straightened his back a little, quickly opening his mouth to lick Kaeya's bottom lip and pulling him in for a deep kiss. Their tongues met lazily and messily, and it felt so good and so noisy in the quiet of the room. Kaeya slowly slid his fingers inside and Childe moaned, closing his legs a little so that he clenched and practically trapped Kaeya's fingers inside him.
“There you go. Now keep it up until I finish my work, yes?”
Tartaglia's response was barely audible, as he was already losing himself in the feeling of being filled. Eventually, Kaeya would leave little kisses on whatever piece of skin he could reach and whisper little encouragements such as 'good boy' or 'you're doing so good, doll' or 'you have no idea how pretty you are when you're turned on like that,' and Childe always shivered to the praise, which made him move slightly and shift the fingers inside him the smallest bit.
Tartaglia dug his fingers into Kaeya's skin, unable to do anything except accept the constant stimulation but also insufficient to do anything for him. He was mewling so needily and rolling his hips just the tiniest bit that Kaeya was already beginning to struggle to keep the act.
“I can feel you—ah—I can feel you with every little movement I make, even if I just breathe. It feels so good, Kae. So good,” Childe mumbled right before continuing to whisper nonsense.
Kaeya held Tartaglia's face tightly and forced him into a kiss, to which he responded pretty well by opening his mouth pliantly for Kaeya as he melted into his lips. At this point Childe was silently begging the other man to touch him, grinding his crotch against the fingers inside him and biting his lip hard.
The thought and mere fact that Childe was making a mess of himself and Kaeya between those four walls where only them existed made a thrill run down Kaeya's body. Childe was getting impossibly louder by the second and his movements were starting to tremble, just like his muscles. Kaeya loved swallowing every small whimper and whine that left Childe and his arousal was just getting stronger thanks to that.
"You're so hot that no matter how many times I destroy you, I will never get tired of it," Kaeya muttered, squeezing Childe's thigh so hard with his free hand that his fingers would likely be etched into the smooth skin—he hoped that would happen.
"You're gonna have to work harder if you want to 'destroy me' as you said."
"Ouch, meanie," Kaeya laughed a little and purposely crooked his fingers inside the other man, making him arch his back and let out a surprised moan.
"Just fuck me already."
“I'm busy now,” lie.
"Might as well just do it myself then," Childe grumbled and began rocking his hips back and forth into Kaeya's fingers.
That immediately put the blue-haired man into action and his free hand gripped Childe's waist tightly while his fingers twisted hastily inside him, forcing him to a halt as his body began to shake.
“You are unusually wet today, Ajax,” he continued moving his own fingers as Tartaglia writhed on top of him.
“Kae, please. Just use me however you want. You can use me anyway, just fucking do something.”
Kaeya smirked so, so pleased, removed his fingers, and gripped Childe way too tightly.
"If that's what you want, doll."
He abruptly rose from the chair with Tartaglia in his arms and walked to the bed, throwing the man there and moving to remove his own clothes. Kaeya purposely undressed slowly as he knew Childe was watching him, and when he was fully exposed he asked, "Does the binder stay on or go off?"
Childe thought for a few seconds before answering, "Off."
Since Kaeya had already removed his own binder, he helped Tartaglia undress himself. He carded his fingers through the ginger hair and made an even bigger mess of the strands, while with his other hand traced random paths through Childe's body.
“Hurry,” Tartaglia mumbled.
“Impatient much, aren’t we?” Kaeya chuckled.
But anyway, Kaeya was tired of waiting too; he was throbbing and very wet. Childe let out a muffled, surprised noise when he felt his nipples being touched. He blinked slowly at the sight of Kaeya suddenly straddling his hips, fingers rolling and hastily tweaking his nipples with a smug look on his face. Kaeya pinched the hard nubs harder than before and every muscle of Childe's body twitched under him.
“Just—please, Kaeya, fuck, please,” Tartaglia whimpered.
“Give me a minute, you know how I love playing with your nipples,” Kaeya smiled as he leaned and captured one of Childe's nipples in his mouth. The latter let out a muffled cry as Kaeya grazed his teeth over the sensitive nub and sucked hard at the skin.
He was so used to everything being so cold and so frigid that sometimes the feeling of sheer heat that Childe caused in him felt unsettling to Kaeya, but he liked it anyway. It felt like hell, but it was the best kind of hell. Coldness and warmth pulsed all at once inside each other and between them, making everything so much more exciting.
Warmth sparked in his groin, an insistent heat building between his legs by the second. He swallowed, and parted his thighs a little more, which caused friction between his bare skin and Childe's, making them both moan simultaneously.
After his vision cleared through the daze of pleasure, Kaeya realized that Tartaglia was clearly trying to control his breathing, and he was going to bury himself before allowing Childe to actually manage to do such a thing.
He changed his position and now sat between the other man's spread legs, slowly moving his hands over Childe's inner thighs. This effectively stopped the ginger’s attempt to control his breathing, as a moan was punched out of him.
Tartaglia's arousal was glistening, and when Kaeya experimentally slid a finger over it, he clenched with a soft moan of, "Do it..."
That being the encouragement he needed, Kaeya pushed his fingers into Childe's slit, slicking them appreciatively. He started with two fingers thrusting them in and out slowly, and he loved to feel the pulse against him as he did so.
Childe covered part of his face with his arm and he was starting to blush from the rising heat enveloping them. His stuttered breathing and lewd noises were affecting Kaeya in ways he couldn't even imagine, and he kept thinking just how beautiful that man was.
When Kaeya was knuckle-deep inside him, Childe mindlessly spread his legs further and exposed himself beautifully to Kaeya. The movement made the fingers bury themselves even more, reaching impossibly deep inside him, and Childe immediately shut his eyes, and threw his head back, moaning.
Kaeya would never allow that image and that sound to leave his mind.
They were both looking at each other through half-lidded eyes. Kaeya sat on his calves and used one hand to continue thrusting inside and the other to rub at Childe’s clit, watching him squirm and shiver beautifully under him.
Seeing how increasingly soaked the man under him was getting, an idea popped into Kaeya's mind and he was quite eager to put it into practice.
He reversed their positions—which caused some confusion in Childe—and scooted himself back down onto the bed so that he was lying flat. With Tartaglia now sitting on top of him, Kaeya pushed the other man's hips forward a little, encouraging him to stand directly over Kaeya's face. That was when Childe realized what was going on, and his eyes widened.
He was surprised enough not to have any reaction until Kaeya lapped at the first time on his wet groin. Then Childe moaned the loudest he had done so far, and his body shook violently.
Kaeya's hands did a slow ride up to Tartaglia's waist and then down again to his thighs around the blue-haired man's head, squeezing tightly on those and using the leverage it gave him to increase his tongue pace, teasing Childe’s clit.
Kaeya knew that if he looked in the mirror at exactly that moment, all he would see would be his reverent expression and blown wide pupils. All because of the man on top of him.
Childe grabbed the bed’s headboard for support and began to grind down against Kaeya's mouth, starting to drip wetness everywhere. Everything was so messy, and Kaeya loved every second of it.
He couldn't close his eyes or even blink because he couldn't miss a second of the immensely dazzling expression on Childe's face. Kaeya may have looked like he was enjoying himself, but when he flattened his tongue against Childe and licked a stripe from his entrance to his clit, the man threw his head back and that . That was a glorious moment in Kaeya’s eyes. And to think he was the one doing that, it only made things even better.
Kaeya wrapped his lips around Childe’s clit and the ginger bucked forward with a sharp cry, just as unable to keep his hips still as he had been all the time they’ve been together. That only encouraged him to continue to lick and suck at his clit, and then move his mouth to his entrance once again to begin fucking him with his tongue in earnest. The whole time Kaeya’s tongue worked inside him, Childe lost himself completely in grinding onto his face and locking Kaeya’s head with his thighs. The whole thing was maddening. He was devouring Childe and the ginger to be loving every second of it, just as he was.
Ajax’s body started to spasm and shook even more, and soon he came with a loud cry followed by, "Fuck, Kae, please please please—" though at this point, Kaeya wasn't sure if he knew what he was begging for.
Kaeya continued lapping at him through his orgasm to both make sure to taste every last drop of him and also to overstimulate the other man. He was gripping Childe's ass hard to keep him correctly positioned and the latter was almost crying from the mix of everything. At that point, Kaeya allowed himself to slide one of his hands down to his own groin and started stroking himself, slow but firm as he liked.
He was about to finally stop when more wetness hit his mouth and he was surprised by it. Kaeya pulled his lips away just enough to look at Childe and his crotch. He was clenching and trembling uncontrollably. Seeing how much liquid was coming out of Childe's cunt was what made Kaeya realize he was squirting, and if the blue-haired man's eye wasn't already excessively consumed by lust in its purest form, that was the last thing left for that to happen.
A low groan reverberated from Kaeya's throat and he dropped his head back in delight as Childe covered him with the liquid dripping from himself. It was at that scene that Kaeya quietly came, feeling his muscles go numb for a few moments.
“Fuck, fuck—,” Tartaglia whimpered too loud for those four walls.
He was shaking enough that he could no longer hold himself upright, so he slowly collapsed and Kaeya hurried to hold him in his arms.
The two of them lay down on the bed—a complete mess now—and just remained silent for a long time. Kaeya cupped Childe's face and caressed him affectionately. He brushed back the strands of ginger hair that were falling over his face and pressed a kiss to the top of Childe's head, and the latter shifted slightly to lie on Kaeya's chest.
They worked together to catch their breaths and within seconds they had ridden out of the post-orgasm high.
"You good, dear?" the blue-haired man asked.
"I am now, so don't you dare leave," his voice was muffled as his cheek was pressed against the other man.
Kaeya giggled and placed another kiss on Childe. "I finished my work a long time ago."
Tartaglia lifted his head, looking slightly angry or as if he was quite offended, and slapped Kaeya on the arm.
“Son of a bitch, you were just playing with me. Fuck you,” he complained.
"And I don't regret anything."
Childe rolled his eyes and laid his head down again. "When my legs stop shaking you'll see, I will avenge myself."
Kaeya laughed once more, tightened his arms around his partner, and whispered in his ear, "Why, I can’t wait for that."