Actions

Work Header

Two-In-One

Summary:

Diluc finds himself having competition with the teenage version of himself out of all people. It's fine, he just needs to prove Kaeya who's better— that shouldn't be so hard? Right...?

Notes:

Ok I know there are fics where Diluc regresses to a shota but are there ones where Kaeya gets double dicked by both versions? I need answers.

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

Work Text:

 

 

 

Kaeya didn't think he'd ever find himself in a situation where two redheads— the same person as a matter of fact— argued over him.

 

The tension was so thick, Kaeya was sure he'd be able to cut it with his sword. 

 

 

 

.

 

(Earlier)

 

 

 

Kaeya glanced at Diluc, or rather the Diluc who had suddenly appeared after searching everywhere for him. But this Diluc seemed a bit off; he was far shorter, much cuter, sweeter, happier, and most definitely, younger.

 

 

Diluc (Luc) walked near, a blush coloring his cheeks every time Kaeya met his stare.

 

"Is it really you... Kae?" Luc asked, he couldn't keep his eyes on Kaeya much longer without reddening like a strawberry. 

 

 

He didn't expect Kaeya to grow up to be this... beautiful. As well as tall, charming, along with his voice grown from a sweet tone to a sing soft purr.

 

Of course, he always knew the quiet and cute little boy would grow up to be stunning, but none of his imaginations had come to this point where Kaeya would look like he had come down from Celestia itself.

 

 

"Of course, Luc. Do I need to prove it to you?" Kaeya chuckled, messily rubbing Luc's hair.

 

"If you're older, does that mean I'm older as well?" Luc asked eagerly.

 

"That's right, although you're not as cheery as you are now" Kaeya nodded with a soft smile.

 

"Oh! And you're a knight too! Does that mean I get to fight alongside you?" Luc's eyes sparkled.

 

"We've always fought alongside each other, have we not?" Kaeya rose his eyebrow.

 

"Yeah, but you had never really desired to be a knight back then" Diluc responded.

 

"Times have changed and you surely have, although you would be most surprised to see how much you've grown" Kaeya snorted.

 

 

 

Alas, they reached the tavern. Luc stared at the building, wondering why they were here of all places.

 

"You'll see what I mean" Kaeya chuckled, tugging Luc's arm and walking into the bar.

 

 

Along with the chime of the taverns, Kaeya and Luc stepped in to find crimson staring right back at them. 

 

Diluc who was cleaning the wine glasses, turned to the sounds of a yelp accompanying two figures. One was a very familiar figure, while the other was one he didn't expect he'd ever see in this lifetime.

 

 

The gears in his head were turning rapidly, but the glare on his face worked quicker. Kaeya walked forward with his signature smirk and Diluc couldn't help staring at the hand the male was holding.

 

"Diluc, meet Luc. Luc, meet Master Diluc" Kaeya introduced them to each other.

 

"That's me?" Luc muttered.

 

"Luc? Is this a joke?" Diluc frowned.

 

"Of course not!" Kaeya huffed.

 

"Then?" Diluc turned towards Luc.

 

 

 

 

"So you're the older me?" Luc pointed at Diluc.

 

"And... you're the younger me" Diluc grunted with a fold of his arms.

 

 

 

It seemed like they had cleared some things up, like how Diluc had suddenly obtained another version of himself by only a few years younger. 

 

There was no reasonable cause as to the only symptoms Luc had felt were a dizzying headache before finding himself in Mondstat a few years in the future. That was then when he encountered Kaeya who was not much like the Kaeya he had back home.

 

 

Luc couldn't quite keep his eyes off Kaeya and with that, he noticed the man smirk at his older self while the latter seemed to not be as appreciative of Kaeya's presence.

 

"Kae, can we go somewhere else? It seems like my older self doesn't know how to be decent" Luc furrowed his eyebrows.

 

"Now now, you do know you're talking about yourself right?" Kaeya chuckled, letting his hand be held by the angered teen.

 

"Surely I had been hit in the head in the future to be like this" Luc glared at Diluc who glared back.

 

"Watch your mouth, kid" Diluc gritted his teeth, his eyes following on Kaeya's hand.

 

"Kid? At least a kid knows how to take care of his little brother properly. All you had done since we've entered was show disrespect to Kae" Luc refuted.

 

"What would you know?" Diluc knitted his eyebrows.

 

"I'd know that Kae never deserves the amount of contempt you've shown. And you're supposed to be the older one!" Luc glared.

 

"I can't believe I grew up to be like you—"

 

"You little—" 

 

"Hey, that's enough!" Kaeya shouted out loud to stop the two from pouncing at each other.

 

 

 

If looks could kill, they both would fall dead on the floor. Their eyes were staring daggers at each other and what infuriated Diluc more was the way Luc clung to Kaeya as if he was his.

 

Even more so was the way Kaeya didn't even try pushing away the kid, still gently brushing through his hair with a smile.

 

 

"I didn't bring you two together just so you would end up fighting" Kaeya breathed. 

 

"I'd appreciate it if you didn't end up killing each other before I could bring this little one home" Kaeya muttered, petting Luc's head.

 

"Home? Can we go back home, Kae?" Luc asked.

 

"I'm afraid someone will have trouble allowing that" Kaeya glanced at Diluc who was quite literally fuming.

 

"I'd rather be crushed by a meteorite than let him anywhere near my manor" Diluc gritted his teeth.

 

"Your manor? It's father's, you ungrateful—" Luc glared before he was cut off.

 

"Ah-ah, it's fine. You can just come stay at my home, how about it?" Kaeya smiled, hurriedly stopping the fight from growing any worse. 

 

"Really?" Luc's eyes widened.

 

"That's right, don't you want to see what my home is like? It's much cozier" Kaeya smiled.

 

"Had I kicked you out, Kae?" Luc asked regrettably.

 

"Why of course not! It was my own choice, don't you worry darling" Kaeya shook his head.

 

 

 

Diluc watched the two talk sweetly together as if nothing else mattered. He felt like he was going to burst a blood vessel as his younger self caressed his cheek shamelessly into Kaeya's chest. 

 

But so was his heart that ached when Kaeya denied the things he had once done just so he could assure the younger one that everything was alright. 

 

 

Diluc clenched his fists before taking a deep breath.

 

"You can stay at my manor for the time being" Diluc spoke up before the two could leave.

 

 

Luc was most definitely startled, but nobody else except Kaeya would freeze as if he were a block of ice.

 

 

"Hm? Why the sudden change, Master Diluc?" Kaeya turned to Diluc.

 

"Your apartment isn't far enough for two people to live in—" Diluc responded before he was rudely disrupted.

 

"Let's go, Kae! It's alright, I don't need much space in bed" Luc spoke smugly, tugging Kaeya's sleeve.

 

"When did you learn such things?" Kaeya gasped with a laugh.

 

"Even then— I'd like to hear what your older self has to say" Kaeya glanced up at Diluc who heaved a breath of relief.

 

 

Luc seemed to disagree, but he stood patiently.

 

"I can have Adelinde prepare a room for both of you" Diluc suggested.

 

"Oh, there's no need for me to stay—" Kaeya shook his head.

 

"But Kae! I don't think he'll let me leave in one piece if you leave me behind!" Luc pouted. "Plus I'll really miss you!" 

 

"It'll be just for the night" Kaeya smiled.

 

"He's right... it's better if you keep watch just in case... I end up doing more than necessary" Diluc eyed Luc who widened his eyes in challenge.

 

"Alright but don't catch me finding you two at each other's hair" Kaeya sighed.

 

Luc stuck his tongue out as he held Kaeya's hand and left the tavern under Diluc's blazing glare.

 

 

 

 


 

 

 

 

Kaeya didn't think he'd find himself in Dawn Winery this way either, as two people stood clingingly near him.

 

"Good night, Luc, Master Diluc" Kaeya waved off to the both of them and shut the door.

 

 

Luc glared at Diluc and Diluc similarly glared back.

 

"I don't know what Kae did to you to make you so rude but don't think you deserve him more than anyone else" Luc whispered so Kaeya wouldn't hear him from the other side. "I can treat him better" 

 

"You're making me want to take back the idea of not throwing you out" Diluc twitched.

 

"Hah, you don't have the balls with Kae on my side" Luc snickered.

 

"We'll see who has the balls" Diluc smirked.

 

 

 


 

 

 

"W—Wait... ngh...!" Kaeya panted.

 

 

Diluc nipped at the sensitive space on Kaeya's neck, pining Kaeya's hands to the bed.

 

Kaeya shuddered with the wet warmth tingling his collarbone.

 

 

"Are you seriously getting jealous because of a kid?" Kaeya teased, blush decorating his cheeks.

 

"You were being awfully close with a kid" Diluc whispered into Kaeya's ear as he shook off Kaeya's pants.

 

"T-That's because he's— ah..." Kaeya moaned as he could feel Diluc run his fingers down his waist and onto his crotch.

 

"Wait... he's going to hear— mmm!" Kaeya shook his head until a hot tongue interfered with his lips.

 

 

Kaeya's eyebrows quivered, mixing his tongue weakly with Diluc's, he felt hot all over once the red took control of his body.

 

 

 

Before he could even realize it, Kaeya felt himself get lifted up and placed onto a warm lap. Diluc hugged him from behind, separating his legs as he gripped the meaty thighs with both of his hands.

 

"Wh—What are you doing...!" Kaeya hissed in a hushed voice.

 

"Showing you who you belong to" Diluc licked Kaeya's nape with a nearly animalistic growl.

 

 

Kaeya's heart skipped a beat. He could feel Diluc's erection rubbing against his ass and with Diluc's tongue dancing throughout his skin, it was hard to keep quiet.

 

"We can't...! L-Luc's going to ah— wake up...! " Kaeya shook his head with whines.

 

"Your cunt says otherwise, why don't you feel how wet you are?" Diluc smirked, taking Kaeya's hand to the cunt that grew soaking wet.

 

 

Kaeya shivered, he could feel the way his finger sunk into the wet flesh. A soft moan escaped his lips while Diluc grounded his bulging length up against his ass.

 

"Why don't you touch your clit while I fuck you, hm?" Diluc whispered, nibbling on Kaeya's ear.

 

 

Kaeya didn't answer, but his fingers begged to differ once they began tracing across his cunt— rubbing against his clit till it sent jolts down his spine. 

 

Diluc slipped out his cock, rubbing against Kaeya's asscheeks like he was contemplating whether to fill Kaeya's ass or his cunt.

 

"A shame I don't have two cocks to fill you up" Diluc grunted, sliding into Kaeya's ass when he made his decision.

 

 

Kaeya gasped out loud when he could feel Diluc's cock drag far into him. His head pulled back, hitting Diluc's shoulder while he could hear a heavy dry swallow coming from Diluc. 

 

Diluc rolled his hips around until he was firmly lodged into Kaeya's ass— a bulge defined his abdomen as he bottomed out. The tightness that Kaeya's ass was bringing was far greater compared to his sopping wet cunt. Even better was the way Kaeya clamped stronger while he was playing with himself.

 

 

Diluc took a bottomless breath, where Kaeya should've known to be prepared. Strong hands lifted him up by his thighs and suddenly, he was dropped back down with no mercy. 

 

 

His breath was immediately knocked out and the only thing he could do was have his mouth agape with noises barely able to escape. The pleasure registered an instant later, a gaspy loud moan flooded his senses before he could slap his palm onto his lips.

 

 

"That's better... hah... let that kid know how well you're getting fucked" Diluc smirked, lifting Kaeya up once again.

 

"N-No... ngnh.. can—can't take it... too deep..." Kaeya cried with a heave of his chest, tears already beginning to slip down his cheeks to no end. He swore he was starting to see more than stars.

 

 

Kaeya caught onto Diluc's hand, feeling as the fingers dug into his thighs. The grip was too tight and the way Diluc's cock stretched him wide was making him far too weak to get the strong clasp off. 

 

Diluc's breath was running down his neck; he was feeling far too many things to understand what was going on. 

 

"Play with yourself, Kae"  Diluc directed into his ear.

 

 

Kaeya complied, running his finger from his clit towards his hole. Thrusting two fingers, Kaeya quivered with bliss. A lewd squelch along with the slaps of Diluc's hips meeting his ass continued to grow louder.

 

 

With time, Kaeya didn't begin to try to contain his volume as soon once he began seeing blurry white in his vision. Diluc's long thick girth was filling him up, dragging against his prostate so that he couldn't even moan before he was pulled back up and filled back in.

 

 

Diluc's grip on his thighs was for sure going to cause a bruise. His own groans were playing in his head like a record player.

 

"A-Ah! nnh Luc r-right there, please..!" Kaeya tried to speak through the gasps and the tears.

 

 

Diluc repeatedly thrusted against Kaeya's prostate. Taking the many chances to taste Kaeya's drool-covered lips whenever Kaeya turned to him and even then, every time he did, Diluc swooned at the sight of Kaeya's tear-stricken face, red flushing his face and his starry eye glistening with tears.

 

Precisely more so were the erotic moans of his name. Kaeya didn't even realize how loud he was being with his guttural sobs as he was calling his childhood name. 

 

"Fuck Kae, you're so tight" Diluc bit out, he similarly didn't hold back.

 

 

His own hands were getting shaky from the tightness. Inside Kaeya, it was hot and narrow. Wet and made just for him.

 

Diluc took the chance to slip his own two fingers into Kaeya's cunt, astonishing the way Kaeya's pussy was giving in so easily. He could feel the way Kaeya's cunt sucked in his fingers. Using his thumb to rub Kaeya's clit, the tightening made his cock feel like it was suffocating.

 

"Luc oh Luc, I'm—I'm going ah— to come... going nnh"  Kaeya whimpered pathetically, wriggling like a damaged toy. 

 

 

Diluc could already feel himself entering his own bliss as well. Kaeya eagerly took in his tongue, moaning against his lips as his eyebrows furrowed as low as they could go.

 

 

With a final pump, Diluc groaned out when Kaeya's ass began engulfing every drop from him. Kaeya's rasping wail alongside the rapid wetness running down his hands were enough to say that Kaeya had also hit his orgasm. 

 

Kaeya quivered against him, his hands reaching out to stop his cunt from spilling to which Diluc seized his wrists. 

 

"Shh, let it out" Diluc grunted, rocking his hips as much as he could to push his semen in as a full claim. 

 

 

Kaeya whined, his clit still remaining sensitive due to Diluc's teasing. Moreover, he was too blissed out to notice the extra addition of red gazing at them.

 

 

"Kae...?" Luc gasped.

 

 

Kaeya jolted, blinking dazedly through the tears to find himself not hallucinating the shocked voice. At the door, through a slit of darkness, he could see younger Diluc standing in shock. 

 

 

Kaeya didn't know how to react how he would even try to explain why he had his legs spread apart, all fucked out with a cock still embedded deep in his ass.

 

Yet, Diluc had the audacity to continue going. Thrusting his cock in so Kaeya could only moan while he was getting pummeled.

 

"N-No...! Luc— do-don't look nngnh... please...!" Kaeya mewled, not being able to look in Luc's direction before Diluc forcefully tilted his chin so he had to look in front.

 

 

Even worse was the way he seemed to enjoy it, his moans were lengthy and for some reason, the ideas of being watched were making him too delicate.

 

 

Luc was, for the most part, flabbergasted but the sporting erection on his pants was showing his true feelings.

 

The poor boy was fidgeting his thumbs, but his eyes stood stuck on Kaeya's glistening cunt even if his cheeks brightened to a vibrant red.

 

 

"That's not fair! You can't have Kae all to yourself!" Luc glared at Diluc.

 

"Who says I can't?" Diluc smirked, thrusting in farther that his balls resounded on Kaeya's ass. Kaeya screamed out in pleasure, his hands unable to hold onto something while Diluc bent him in half.

 

"K-Kae said!" Luc fumbled under his words.

 

"I love Kae more than you could, you don't even treat him right!" Luc clenched his fists in anger.

 

"Then let's let him judge who can treat him better" Diluc suggested, sucking the base of Kaeya's neck with provocation.

 

 

 

Luc didn't need to say anything else. His feet already reaching to the bed as his knees sunk into the mattress. His hand reached out till he could sink his finger into the dripping cunt. 

 

Kaeya whined, sensing the intrusion despite the oversensitiveness. Diluc was still moving his hips up while Luc was fingering his cunt.

 

 

Luc's eyes stretched once he could feel how hot and snug Kaeya's cunt was on his fingers.

 

He would've never thought he'd be doing things like this; other than occasional kisses on the lips and tight hugs, they had never really gone further than that, but now seeing how beautiful Kaeya looked with a cock up his ass, Luc couldn't help but feel the desire overflowing. 

 

 

In the past, Luc would've wanted to take his time with his pretty little brother, but with how infuriating his older self was being by slamming into what's his, he just needed to show Kaeya who was the better version.

 

 

He slipped out his painfully hard cock; grazing it against the lips of Kaeya's cunt, he already found himself letting out a trembly sigh. 

 

 

Kaeya's moans were enchanting, they sounded like Celestia's bells themselves and as he sunk his cock into Kaeya's cunt, the sounds grew louder. 

 

His confidence bloomed alongside it, leading him to push in until his hips met with Kaeya's cool skin. A choked gasp left Kaeya's lips, his head once again pulling far back in quivers. 

 

 

Luc could feel the tight suction on his cock. The sensations were making him zone out but with Diluc's movement, Luc made sure to do his own work.

 

 

Kaeya, who was being penetrated by two separate cocks, couldn't feel his breath in his lungs anymore. His eyes were going to move to the back of his head at this point. 

 

 

With two very different speeds, but nearly the same length inside of him, Kaeya couldn't handle how overwhelming every nerve was spiraling into. 

 

 

Kaeya sobbed feebly, the cocks inside him were going to tear him apart. The two very large bulges under his stomach were fighting over dominance yet it didn't matter because either one of them would be able to stretch him as deep.

 

 

Luc eagerly placed kisses on Kaeya's lips. Having a taste of Kaeya's mouth how wonderfully he felt and how delectable he sounded. His little brother was so perfect. 

 

 

At the same time, Diluc bit on Kaeya's shoulder, marking every piece of skin with bites to which he caressed with his tongue soon after. Kaeya's tight ass enveloped his cock like the excellent cockslut he was. His pleads for more while he rammed into him didn't remain unheard. 

 

 

 

Kaeya's tongue was lolled out while both Diluc's ravaged him out.

 

"O-Oh...! I-I'm, g—going to come...!" Kaeya cried with a voice thick with tears.

 

 

His ass felt so full with Diluc's leftover semen and he was sure the younger version would fill him up just the same.

 

"K-Kae...! Going to come!" Luc moaned, kissing him on the lips.

 

Diluc grunts, but it seemed like he was close too.

 

 

Kaeya whimpered, his eyes blanking out as a deep shudder was left of him. Luc overwhelmed his mouth with his tongue while Diluc gripped his thighs.

 

 

Both redheads trembled, taking their claim of Kaeya for themselves.

 

The overfilling sensations of thick loads shooting inside him had done the deed. Kaeya felt like his whole body was going to burst, making his head go numb. 

 

Lips spasmed while both Dilucs slipped out at the same time. Streams of semen ran down his thighs, mixing to be one. 

 

 

Before he could even plop on the bed, two different arms pulled him up.

 

 

"How did I do, Kae?" Luc asked expectantly, blush filling his cheeks shamelessly after fucking the air out of him.

 

"Not any better than what I could've done" Diluc smirked with a shake of his head, not feeling the less content.

 

 

Kaeya didn't even have the energy to reply back before slumping on both of them and falling unconscious.

 

 

He just hoped that both were gracious enough to let his body mend after all that.

 

 

 

Notes:

Was writing this, remembered to do dailies, did dailies, returned back to smut because Kaeya getting a taste of both worlds > anything else.

Series this work belongs to: