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It was supposed to be simple.
Really, simple. Their first time should be simple. A little gift for Diluc’s birthday. They’re both too tired and worn out with life to do anything drastic or dramatic, too busy with Mondstadt stuff to make complicated romantic preparations. They will kiss, they will fuck, quickly and satisfyingly, and then they will go rest in each other’s arms, warm and content and sated, because they’re in love with each other. Kaeya thinks that’s enough, him and Diluc, together.
But it’s not that simple.
The thing is, Kaeya doesn’t expect Diluc to be… that big.
Like, ridiculously big. Your-dick-is-the-size-of-my-thighs big. Okay, maybe not that much, but close. Diluc is big, always has been since the days of their childhood, always surpassing Kaeya in both height and weight. Diluc is big, and strong, with sculpted muscles bulging out of his tight black suits. And Kaeya knows of all this – of course, he has been staring, looking, salivating – imagining those arms pinning him down with unrestrained strengths. He had expected Diluc’s hands to be long too, thick and hardened with calluses on his fingers after hours of wielding a claymore.
Yet.
Yet he’s here, sobbing into his arms, tongue lolling out of his mouth, eyes rolling back – absolutely taken apart by how Diluc is so, so close, caging him in and splitting him open with only his fingers.
It’s just only foreplay. Kaeya doesn’t know if he can last for the real thing. At this rate, probably not.
He had expected the size, and the length, but this – whatever he didn’t expect it to be this arousing, this overwhelming – the way Diluc is holding him so tightly, almost pinning him straight down to the bed, hand pumping in-out-in-out of his hole, a determined expression on his face. His eyes are drenched with tears, and there are little hiccups – breathy and whiny – working their way out of his throat. Kaeya wants to moan, long and shaky, to let Diluc knows he’s doing good, so good, or say something, probably teasing Diluc for how his red hair is messily spilling out of his ponytail (a funny thing to make fun of, because Diluc still looks stupidly handsome and gorgeous, wild hair or not.) He wants to make noises, any noise that is not these pathetic sobs, but he can’t.
Not when Diluc’s fingers are still knuckles-deep inside him, relentlessly jabbing at his most sensitive spots.
It should not be this intense. After all, it’s just two fingers. It should not be anything different to all the time Kaeya has done this to himself before. But it is. Diluc’s hands are so, so much thicker, and bigger than him, reaching just the right places. And it’s not simply fingers, either.
It’s Diluc, he concludes, that makes this so… exhilarating . .
Diluc’s intense, concentrated gaze. Diluc’s red hair, a forest fire spreading in the base of his stomach. Diluc’s hand, strong and long and thick, pinning him right there on the bed. Diluc’s arms, bulging veins and scars drawing patterns. Diluc, Diluc, Diluc.
Diluc Ragnvindr, the one that has stayed, the one that he wanted, for almost all of his lifetime.
Diluc, leaning in and kissing him, drinking him up like he’s the oasis in the middle of a desert. Diluc, holding Kaeya tightly, like he might disappear at any second, and yet so carefully, like he’s a treasured piece. Diluc, gaze intense and loving at the same time. Diluc, whispering sweet praises in his ears.
“So good, so good - soft and open for me like this, Kaeya. You’re so beautiful – so pretty like this. I love you – I want you so bad.”
Kaeya knows that. Diluc’s bulge is against his leg, hot and warm and so fucking big . He salivates, drool pooling in his mouth, dripping out the corner of his mouth. Oh, how much he wants it.
He wants to feel it in the grasp of his fingers, wants to see how his fingers can’t completely wrap itself against the monstrosity, wants to put it in his mouth and feel the salty taste of precum and musk on his tongue, wants it to reach his tonsil, making him choke and tear up and. But that, he will save it for another time. Right now, he wants it inside him, desperately.
He needs to feel the stretch of that thing in him, to feel it fill every nook and cranny, needs to be fucked so savagely he’d remember the sting for days, his thighs would quiver every time he walks.
Diluc’s fingers reach somewhere inside, and Kaeya gasps. He almost came – muscles spasming, eyes rolling back – but he held back. Kaeya can’t come, not until he gets that dick inside him.
If Diluc does not fuck him right now, Kaeya is certain that he would die.
“That’s enough stretching,” Kaeya whimpers, “put it in me now, idiot.”
And then Diluc has the audacity to fucking stare at him, bug-eyed and all that. “Do you”, he hesitates, (very unsuitable for someone who’s still knuckles-deep inside him), “do you think you’re stretched enough?”
Kaeya wants to laugh. Or to punch him square in the shoulders like what he used to do when little Diluc Ragnvindr does or says something particularly stupid. He’s been fingered within an inch of his life for the past fifteen minutes, and Diluc still has the audacity to ask him that.
Diluc must have sensed Kaeya’s thoughts, because he’s pulling his fingers out and wiping it on a piece of tissue. “Just for sure, you know,” he says, annoyingly concerned, “I’m kind of big.”
Kaeya snorts. This is Diluc Ragnvindr, he thinks, always saying the most ridiculous things with a straight face and a deadpan tone. “Yes, you’re big”, he retorts, “but I want that thing inside me now”, he says, gesturing at the obvious bulge in Diluc’s pants.
“Are you completely sure?”, Diluc asks again, voice soft and a little worried, “I can finger you better so you wouldn’t get hurt.”
And Kaeya lets out a surprisingly ugly choke, something between a sob and a giggle, because Diluc. Oh, Diluc. He can be annoyingly persistent sometimes, like this, insisting on stretching Kaeya a little more so that the stretch will be a little bearable, even if he’s obviously painfully hard.
“No need”, Kaeya chuckles, “and I want it raw. On my knees, too.”
Diluc’s eyes widen again, but then he nods, a raw, savage look replacing the soft, concerned gaze from before, and the change almost gives Kaeya whiplash.
“If you’re completely sure”, Diluc says, tugging his pants down. Kaeya can’t help but stare, drooling at the ridiculous size, at the auburn hair at the base of his cock, how pearls of precum are already drooling at the top of his dick. He wants it inside of him – right now.
“Now”, he says, getting on his fours. “Put it in me."
He tries to be a little challenging, a little teasing, a little nonchalant – but Kaeya knows Diluc will see it right through – Diluc will hear the little quiver in his voice, the desperation in his tone. He wants this, he needs this, needs to have Diluc’s cock buried deep inside him and Diluc’s hands on him. He needs Diluc.
And Kaeya knows Diluc knows it too. They both want this, and they both need each other.
Diluc pushes in, painfully slowly, and they both groan when the head finally, finally pops in. Kaeya’s eyes roll back. Maybe Diluc was right, he does need more preparation. It’s big, so fucking big , and ridiculously thick. The stretch is almost painful - like he’s being split open on cock. Diluc’s grips on his waist doesn’t help. It feels too overwhelming, almost, that he nearly whites out – the sensation of being trapped, of being held there, like Diluc’s forcing him to take it, the whole monstrosity of him.
“Are you okay?”, Diluc asks, concern clear in his tone. Kaeya can’t give him a comprehensible answer, not when Diluc’s still pushing in him painfully slowly like this, filling and stretching him so full. His thighs quiver, his eyes water, and he lets out a garbled gasp, “Yes, yes, please, more, more .”
He wants more, so much more, wants to feel Diluc’s cock reaching his deepest, wants Diluc to push in-in-in, wants to feel the entirety of it inside him. He wriggles his hips, desperate for more. Kaeya can hear the worried groan of Diluc, and he wants to assure him that no, he isn’t hurt, he just wants this so, so much, for so, so long, ever since they were teenagers, wrestling and pinning each other down.
But Diluc’s cock makes him feel so horrifyingly full, and hot, and open. Diluc hasn’t pushed in entirely yet, but his eyes are already rolling back, lashes wet and tear-drenched. He tries to answer – but all that comes from his mouth is a bunch of garbled moans and whimpers. Not even a long moan, just tiny, little sounds being pushed out of his lips.
Somewhere along the lines, his sobs must have awakened something inside Diluc. The redhead pulls out, entirely, and Kaeya lets out a ridiculous, keen sound, because it just feels so, so empty. Then, he flips Kaeya down on his back, a hand pinning both of Kaeya’s wrists together, one hand gripping his waist so tightly Kaeya almost came from the thought of it leaving marks.
He pushes in, all at one.
Kaeya’s cock is a drooling wet mess now, soppy precum beads leaking freely from the tip of his dick, almost like he’s pissing. He must look like a mess now, or even a fucked out cheap whore – eyes glazed over, drool dripping from the corner of his mouth. He hopes Diluc can see all of it, see how easy it is to render Kaeya useless from his cock alone.
It’s overwhelming, being fucked like this, facing Diluc straight-on. His red hair pools around his face messily, an inferno that consumes Kaeya from the inside, licking his guts, lighting his stomach on fire. The red of his eyes are even more blistering like this, with the intense, wanting gaze, like he wants to eat Kaeya, whole and alive, like he wants to make Kaeya cum so much he passes out. It’s terrifying, like looking at a wildfire, like gazing at the sun on a hot day. It burns and stings, but it mesmerizes at the same time, and Kaeya can’t look away from it.
Diluc groans, thrusting deeper, deeper, and it shouldn’t be this deep, this full, this hot , but it is. Kaeya’s being pinned down just by one of Diluc’s hand, and he knows he can get out of it – just say the word and Diluc will stop, but he doesn’t want to. He wants more – more, more. This is enough, yes, but not enough to satisfy the bone-ache hunger in his limbs.
It’s so fucking hot, and messy, and Kaeya’s painfully in love. He loves this man so much he wants to tear his heart out and set it on a silver platter. Loves pools in his heart, burning and searing.
“I love you,” he gasps out, “I love you so much, Diluc.”
That must have set something in Diluc alight, because he’s leaning in, kissing Kaeya soppily. It’s even fucking deeper like this, and Diluc’s thrusts are fervent, like he can’t get enough, like he’d die if he lets Kaeya go, even if for one second.
“I love you too”, Diluc gasps, “Love you so much Kaeya. Love you, love you, love you, love you.”
He says it like a chant, like a prayer. And before Kaeya knows it, he’s already letting out a gasp, toes curling, muscles clenching, eyes rolling back – he’s unraveling. Before he knows it, he’s cumming – so hard and fast that some of the cum gets on his own face.
“Diluc”, he wails, “Diluc, love you, love you too.”
“Fuck, you’re so fucking hot like this,” Diluc swears, and pushes in even harder, deeper, if that’s even possible. Kaeya’s still painfully sensitive – every nerve in his body feels like it’s burning – and yet Diluc doesn’t seem to see it. He keeps thrusting, thrusting, chasing his own orgasm – almost treating Kaeya like nothing but a flesh toy to satisfy his own needs. And it’s so fucking hot.
“I’m close,” Diluc grits out, voice gravelling. “Inside?”
“Yes, yes, yes,” Kaeya whines, almost begging, “Inside me, please, I want to feel it, cum inside me, breed me full of your children–”
Kaeya claws at Diluc’s back, and Diluc finally, finally cums.
It’s full, so terrifyingly full. Kaeya’s eyes roll back, muscles twitching. His cock pathetically spurting out cum again.
“That was good,” Diluc laughs, and Kaeya laughs, too, a little boneless, tired laugh. “You’re so hot”, he adds, fingers mindlessly threading through Kaeya’s hair, untangling them and tucking a few messy strands behind his ears. It should be funny, the way they so quickly return back to their softness, the quiet, familiar intimacy, right after a round of savage fucking.
But they’re Kaeya Alberich and Diluc Ragnvindr, Kaeya thinks. Two people that have known each other for almost all of their lifetime, two people that have been there for each other, two people that defy destiny and hold each other’s hand through fire and ice. They’re Kaeya Alberich and Diluc Ragnvindr, and they will always be there for each other.
“Let me clean you up”, Diluc says, standing up to get a wet towel, and Kaeya nods. His entire body aches, his legs feel like jelly, but he has never felt more sated, more content in his life. Kaeya watches as Diluc stands up, hair as bright as fire pooling down his clawmark-marred back, and can’t help but smile. This is them, Kaeya Alberich and Diluc Ragnvindr, and he wouldn’t want it to be any other way.