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Kaeya had been in the middle of pressing light kisses into Diluc’s neck when he felt him groan awake, so he sat back even as he kept his thighs flush against Diluc’s abdomen, smiling brightly when the other was finally fully roused, blearily blinking sleep away from his eyes.
“Good morning,” Kaeya greeted cordially as he took in Diluc’s expression, “slept well?”
Diluc shifted, and Kaeya’s smile widened when realisation dawned on the other’s face when he found that his movements were restricted with the way his hands had been tied to the iron bars of the bed frame behind his head. The navy blue silk cords made a sharp, beautiful contrast to the splay of fiery red hair that it rested on, and Kaeya watched as Diluc narrowed his eyes in consideration.
“Well enough to know I didn’t go to sleep tied up,” Diluc inclined his head in thought, “you’re in a mood. What’s the occasion?”
“Do I need an occasion to have sex with you?” Kaeya asked in faux innocence as he dipped downwards to kiss the nape of Diluc’s neck, enjoying the way the other squirmed in response. Diluc had always been particularly sensitive here, and it was only when he was bound like this did Kaeya get to enjoy teasing him with tickles, “but if you really insist on an answer, I guess I simply missed you while you were away.”
“And yet I’ve been back for a week,” Diluc groaned, and even against the low of Kaeya’s back, on the curve of his butt, Kaeya could feel the way Diluc’s cock hardened in response with each touch, “what’s the real answer, Kaeya?”
In truth, Kaeya knew he was being petty. Donna had finally worked up the audacity to ask to join the both of them at their table, and in the public eye, Diluc had politely accepted. His irritation from last night continued to linger at the back of his mind, and even though Kaeya knew it was childish to feel frustration about Diluc’s politeness, the fact remained that he was. He’d sooner stab his eye than admit it, though, so in lieu of a response, Kaeya nipped at Diluc’s skin with just enough pressure that he knew would make Diluc gasp and squirm in his restraints.
Kaeya kept at it, pressing a litter of kisses and bites into Diluc’s body, trailing across the broad length of Diluc’s chest to elicit an arousing symphony of moans and pleasured noises. As Diluc arched into him involuntarily, Kaeya’s fingers pressed firmly into him as he sucked on skin, refusing to stop until a constellation of dark, purple bruises bloomed across Diluc’s pale body. With each mark that Kaeya made, Diluc’s erection only seemed to swell in firmness against his back, and Kaeya hummed in satisfaction as he rubbed against the valley of his own buttcheeks. There’s a wet stickiness smudging itself into Kaeya’s skin with each movement, Diluc’s interest so obvious and so tangible.
It’s a pleasant thought that Kaeya was glad to entertain as he pulled back, admiring his handiwork with pride as he took in the way Diluc was flushed with arousal, his breathing already uneven as he stared back at Kaeya with heavy, lidded eyes.
“Kaeya,” Diluc growled, dark and low in frustration, the impatience already evident on his face.
Kaeya smiled coyly before leaning in again, kissing each bruise in turn, like each mark was further proof of his claim on Diluc’s person. Kaeya wanted to take his time today, to enjoy every inch of Diluc body and relish in the knowledge that this was all exclusively his to partake in.
“Diluc,” Kaeya hummed in response, swirling his tongue over Diluc’s nipple to draw out another moan. Diluc’s skin was salty from perspiration, but to Kaeya, it was a perfectly sweet indulgence that he loved to partake in, and he licked until it was perfectly pert and pink. Satisfied, Kaeya moved on to the next nipple, shimmying his ass downwards to feel Diluc’s erection slide along him, feeling the thick girth chafe between his buttcheeks as precum was further smeared across his skin.
There’s the sound of strained creaking from the headboard as Diluc tugged himself forward fruitlessly. Kaeya laughed, confident in the integrity of his rope work, and he slid himself further down on Diluc’s body, enjoying the full body shudder from Diluc as their cocks grazed each other, delighted as Diluc’s hips bucked upwards in want of more.
“Eager today, aren’t you?”
Diluc scowled up, but there was no heat in his expression, “speak for yourself - you say that while shamelessly grinding down on me like an animal in heat.”
Kaeya smirked down at him, “just making it a point to appreciate you, my sweet darling.”
Diluc flushed harder in response, turning away slightly so he wasn’t meeting Kaeya face on. Even then, Kaeya could see the way his eyes were clouded with lust, and he took the both of them into his hand, spreading more precum together over their erections in lazy strokes and drawing Diluc’s attention back on him.
Held together, Kaeya could properly marvel at the difference between their cocks. Kaeya himself had a sizeable dick, but against Diluc’s he could see how he outmatched in every way - in both length and in thickness. There’s a weighty girthiness to Diluc’s cock, swollen and veiny as if it it might burst at any moment. Kaeya took his time rubbing them together, enjoying the pleasant feel of the way his cock rubbed up against Diluc, how it was dwarfed and overwhelmed in comparison.
“nghh- Kaeya,” Diluc groaned, his head knocking backwards against the headboard as he continued to struggle uselessly in his restraints, “Kaeyaaaa,”
“Yes, my dear Master Diluc?”
“Hurry up,” it’s almost a whine at this point, and Kaeya laughed.
“And there you were complaining about me.”
“It’s not a complaint, it’s an observation,” Diluc remarked, shifting to thrust himself further in Kaeya’s hand. With the way Diluc’s movements remained largely restricted, it’s a clumsy movement without any of the predatory grace that Diluc typically moved with, but Kaeya appreciated his enthusiasm nonetheless, pleased that Diluc remained so easily riled for him, so easily read and taken apart.
“Fine, fine, if Master Diluc insists,” Kaeya said, and he allowed himself a genuine smile as he pushed himself up, his hands spreading himself open as he perched his ass just above Diluc’s cock, “ready?”
Diluc shot him a look, “please,” he all but demanded, bucking upwards in want.
In truth, Kaeya could relate, his own erection needy and throbbing, and he slid himself downwards in a smooth motion, letting the distinct width of Diluc’s cock push up against his walls tightly to stretch him out, sliding inch by glorious inch of cock into himself. The smooth slick of pre-cum and the oil that Kaeya had previously prepped himself with aided its entrance, and as Kaeya took him in, he could hear Diluc’s breath hitched audibly. Kaeya closed his eyes for a moment to focus on the feeling of being filled up so completely, letting himself shudder from the completeness of Diluc inside him.
Normally, Diluc would have his hands firm on Kaeya’s waist, gripping so tight that he could bruise as he pushed and pulled while he thrust into Kaeya. This time, Kaeya relished the control he had as he bounced himself on Diluc’s cock, slow and tantalising at first to draw out every frustrated groan he could pull out from Diluc, to luxuriate in the blatant arousal, the clear attraction that Diluc held towards him.
“Kaeya,” Diluc groaned again, whiney and pleasing in his tone. It’s a sound that Kaeya hadn’t heard in a while, so similar to the noise that Diluc occasionally made as a child whenever he was aghast that he wasn’t getting his way, and it only served to further enable him.
Kaeya moved slowly, well aware that it was not a pace that Diluc enjoyed. It was not one that he liked either, but if jerking Diluc around in the bedroom was all it took to incite that nostalgic brand of childishness in him, then Kaeya would have done it sooner.
“Diluc,” Kaeya sang sweetly in response, his walls clenching tightly around Diluc as he rode on that wonderful cock, though his pleasure came more so from watching Diluc squirm in impatience.
Still, Kaeya wasn’t an absolute sadist, and when Diluc’s struggling seemed to reach a peak, his restraints pulling painfully against the headboard, Kaeya shifted, bouncing faster as he took Diluc in. He could feel the trails of perspiration sliding down on his skin, and he brushed his hair backwards, letting his body move along to a familiar rhythm as he took in the way Diluc moaned and gasped beautifully, his body arcing eagerly into Kaeya to take in more of him.
Kaeya built the both of them to an easy orgasm, his body quickly drenched with cum - both his own and Diluc’s, and even though Kaeya’s legs threatened to give way, Kaeya kept his pace on, steadily, if somewhat slowly.
In front of him, Diluc was red-faced from his climax, his breaths heaving as he came down from his high, and Kaeya smirked in satisfaction.
“Didn’t take much-”
Before he could finish his sentence, Kaeya was momentarily shocked into silence when a small fire erupted in Diluc’s hands, burning away the silk chords and freeing Diluc from his restraints. Kaeya barely had time to blink when Diluc swung himself forward bodily, his hands pushing Kaeya back onto the bed, his vision tilting dramatically until the back of Kaeya’s head found the soft fabric of their shared bed.
“Ah-”
“Ah indeed,” Diluc said, having tipped Kaeya onto his back in one swift motion even while he remained firmly tucked inside Kaeya, “I think I’ve figured out why you’re so irritating this morning.”
“What a cruel way to talk about your lover,” Kaeya joked, but there was a certain seriousness in Diluc’s eye as he leaned in close, his hands pressing down firmly on Kaeya’s shoulders.
“So you understand that I’m your lover,” Diluc said, and it was an oddly honest declaration on his lips, “then you should also understand there isn’t a need for you to be jealous.”
Kaeya raised an eyebrow at that, all pleasantly false bravado. Even so, he put his arms around Diluc’s neck to draw him even closer, smiling brightly up at him, “care to enlighten me on the esoteric thoughts of our Master Diluc?”
Diluc scoffed, thrusting again into Kaeya - Kaeya’a barely had any time to recover from his first orgasm, and the way Diluc’s cock pressed up firmly against his prostate offered more pain than pleasure, enough that it brought tears to the corner of his eye, prickling and hot. But Kaeya bit down on his lip, pushing through anyway as he let that roll through him, until the pain finally eased off him to give way to pleasure.
“Have you ever considered being less of a hypocrite?” Diluc grunted, shifting Kaeya’s legs so they hung over his shoulders, folding Kaeya’s body such that Kaeya could feel Diluc’s cock reach even deeper, and the grip he had on Diluc’s neck only tightened as Kaeya groaned, the shock of arousal passing through him searing and arresting in its wake.
“Not the - ah - slightest clue what you’re talking about -” Kaeya sang, but there was an obvious, awkward lilt to his words that revealed how distracted he was - Diluc’s cock filled him up so thoroughly that Kaeya felt he might just burst at the seams. Kaeya swore he could feel the way it pushed at his stomach, certain that if he looked down now he could trace the outline of Diluc’s cock on his abdomen with each thrust that was made into him.
“No?” Diluc slammed himself into Kaeya in one particularly rough motion, “you have the cheek to be annoyed with me letting Donna sit with us at Good Hunter, and yet you parade yourself around in clothes that either bared skin or clung so tightly to you that one didn’t need imagination to know the shape of your naked body-”
“How is it the same?” Kaeya gasped, blinking past tears to shoot Diluc the firmest look that he could muster, “it’s not like I actually engage with anyone outside of work.”
“-and you insist on me not marking your skin so that you could hide this relationship from the rest of Mond, while you leave a clutter of bruises on mine.”
“Work,” Kaeya emphasized, the fog of arousal already rushing into his mind to crowd out any other thought. Kaeya’s head knocked backwards as he closed his eyes to feel the way each pulse of pleasure from Diluc’s thrust pushed through his body, how it radiated from his prostate to the extremities of his body, soaking through him so deeply that Kaeya could feel it in his bones, “ah, Diluc,”
They don’t exchange many more words after that as Diluc fucked him like he was working through a personal vendetta - and Kaeya let him, revelling in the intimacy of roughness, in the complacency that born of a true familiarity between people who had been through hell and back and would do so again a thousand times over. Kaeya’s arousal was stoked to its peak, and he was pushed until he would think no more, their lips crashing together - whether by his hand or Diluc’s, Kaeya couldn’t tell - so that they were melded at every possible point. Diluc fucked him with the ferocity of an orchestra playing its swansong, until Kaeya was shuddering wholly, cum spurting messily from him to land somewhere between them as he groaned into Diluc’s mouth, sucking harder on Diluc’s tongue as he came.
Kaeya gave himself to this new orgasm, more potent and far deeper reaching than the last as his body shook and convulsed uncontrollably. He felt Diluc’s own climax, pumping yet another load of hot liquid into him, surrounding Kaeya with a distinct warmth that reeked of sex and musk. Diluc’s thrusts eventually came to a gradual slow, and as Kaeya rode out the waves of pleasure, each one a faded echo of the previous, he waited for Diluc to pull out.
Instead, he felt Diluc shift, his cock remaining inside Kaeya even as the rest of him pulled away. Diluc’s eyes cast down on him with a firm smugness as he dragged a finger across the splatter of cum on Kaeya’s stomach. Kaeya shivered in response, feeling the way it ran over the bump of Diluc’s cock still inside of him.
“This,” Diluc said, his finger laden with Kaeya’s own cum as he traced a circle around Kaeya’s left nipple, “mine. This? Also mine.” Diluc drew a line across the width of Kaeya’s chest until it arrived at Kaeya’s other nipple, flicking rapidly at it as he smeared cum over it, his fingers deft and expert despite the slippery slick between them.
“Marking your territory like a beast, Master Diluc?” Kaeya complained between groans, already feeling a new wave of arousal coursing through him, his body leaning into Diluc’s touch, eager and hungry for more, “I’m surprised - that’s low, even for you.”
“On the contrary,” Diluc shrugged, his voice a deep rumble as he dipped downwards to breathe hot words into Kaeya’s ear, “I’m training you like one, and I’ll keep going until you finally learn your lesson.”
Kaeya felt the skin of his neck being caught between teeth, biting and sucking in the way that Kaeya had explicitly told Diluc not to, and fine, maybe he did deserve that.
He’s not about to tell Diluc that though, so in response, Kaeya laughed, bucking his hip and clenching tighter around Diluc in invitation, “you’re certainly welcome to try.”