Archive of Our Own ^beta

“Hey, Isaac… Can I ask you something?” Grunk’s voice is quiet, trying not to interrupt the peaceful silence that settled between the both of them.

“Mhm?” Isaac hums, holding Grunk closer. He’s on the older’s lap, pulled so close that he could feel the vibrations of his hum against his back.

Sighing happily as he’s held, Grunk snuggles as close as possible, never wanting the moment to end. Unfortunately, he’s fidgeting with nerves as he tries to formulate the question he has as clearly as possible.

“So- uh- y’know how you said I was, um, pretty? Before?” He asks, fiddling with Isaac’s fingers as he speaks.

“Yeah,” Isaac smiles, nodding in agreement almost immediately. “The prettiest.”

Grunk’s heart feels like it’s going to explode with the way Isaac says it so casually. He blushes at the compliment, a giddy smile on his face as he continues to stare at Isaac’s fingers in his hand. “Right, well,” he clears his throat, attempting to quell the smile, “what else do you like about me?”

It’d clear he’s fishing for compliments, but it doesn’t seem like the taller minds at all. Instead, he smiles and turns Grunk around, so their chests are touching. He grabs his cheeks in his big hands, gently forcing him to make eye contact.

“I love everything about you,” Isaac starts, a serious tone to his voice. “Your terrible sense of humor, your personality, your hair, your nose, your eyes – even though you’re constantly worrying and complaining about them,” he chuckles, thumbs gently rubbing the skin under his eyes, “they’re still adorable. Same with your lips, and the cute way your cheeks flush when I compliment you… Just… Everything.”

The more Isaac lists off, the harder Grunk blushes. He feels like he’s going to die from the rush of emotions he’s having… but he can’t help but love every second of it.

He practically melts into Isaac, heart racing as he listens to the words he says. Barely able to form proper thoughts or words due to the wave of affection washing over him, he takes a deep breath to try and calm himself. Eventually, he’s able to speak, looking up at Isaac shyly.

“You really think all of those things?” He asks, gazing up at him with shining eyes. Isaac smiles back, rubbing his thumbs along Grunk’s cheekbones. “Of course,” he whispers easily, grinning wider as he leans into his touch.

Grunk makes a flustered noise, biting his lip softly. The only thing that’s able to come out of his mouth is a quiet, “Prove it.”

Isaac’s eyes darken a little at his words, thumbs freezing on his face. “And how do you want me to do that, baby?” He whispers, one thumb moving to brush against his bottom lip.

A shiver wracks through Grunk’s body at the pet name, and a rush of butterflies fills his stomach at the feeling of Isaac’s thumb against his lip. He can only stare up at him with wide eyes for a moment, not really thinking he’d get this far, before he finally found his words. “You – uh, you could kiss me.”

The other smiles softly at that. “Yeah?” He murmurs, leaning in slightly. Grunk’s blush intensifies as he leans in closer, the butterflies in his stomach going crazy as he closes his eyes and parts his lips ever so slightly.

He can practically hear his heartbeat in his chest with how nervous he is, but he’s still able to confirm that he really does want this. “Y-Yeah… please.”

Smiling wider, Isaac presses his lips to Grunk’s gently, caressing his cheek with one hand while the other slides down to his hip.

Grunk’s heart literally skips a beat as their lips meet, and he melts once more at the feeling of his huge hand on his hip. Sighing softly against his lips, Grunk practically moans at the way he touches his skin. Pulling away for a moment to take a deep breath, he speaks, voice low and needy, “More… please.”

Isaac chuckles at his tone, squeezing his hip lightly. “We just started, baby doll… So needy already,” he hums, kissing the younger deeply. A soft moan escapes Grunk’s mouth at the nickname.

He feels like he could drown in the feeling of Isaac’s touch, and kiss, and voice… The sensation of everything making his body feel like it’s on fire. The only thing he can do is lean into the kiss and try to communicate how desperate he is for him through body language.

Slipping his tongue into Grunk’s mouth, Isaac quickly and easily wins the battle for dominance. He presses closer, pulling the other into his lap as far as possible. Grunk lets out another little moan as he claims that dominance, allowing Isaac to overpower him and make him melt under his touch. He’s desperate and hungry for his every touch, tongue mingling with his as he completely gives himself to him.

Their tongues slide together sloppily, smacking noises filling the previously silent space as they kiss hungrily. The little noises Grunk makes cause Isaac to groan into his mouth, hips bucking up against the smaller unintentionally.

Whining, Grunk could feel his heart race faster at the movement, a shiver running down his spine. He’s completely lost in the heat of the moment as he kisses Isaac desperately, needing more and more of his touch, taste, and smell. He feels like he’d go insane if he didn’t have all of him.

He lets out a loud moan as Isaac bites his bottom lip softly, shuddering as his hands begin to guide him, hips rolling against Isaac’s leg. His hands squeeze Grunk’s hips tightly, and he groans at the feeling of him being completely at his mercy. Isaac’s strength makes moving the younger easy, and he uses that to his advantage.

Gasping for air, Grunk pulls away from the kiss, hands flying up to grasp at his shoulders as Isaac controls every little move he makes.

“Please,” he whines softly, “don’t stop.”

Isaac growls, head falling to the crook of his neck, big hands making their way to rest on his ass. He pulls Grunk closer, using the new position to his advantage and making him grind against his thigh harder. “Don’t plan on it, sweetheart,” Isaac pants into his ear hotly.

Grunk’s breath hitches at the pet name, hips meeting his own. His eyes flutter as the position changes. He can feel everything. Letting out a soft moan, his head falls to Isaac’s shoulder. “Good,” he whines, “more please.”

The request is immediately approved, his hips rocking up into Grunk’s and creating a steady rhythm. His hands tighten in Isaac’s shirt, holding on like he’s the only thing keeping him alive.

As Isaac’s hips meet Grunk’s, the smaller whimpers pathetically, unable to do much else but beg for more. “Please,” he moans, twitching in the other’s lap. At the plea, Isaac groans against his ear, nibbling on the lobe gently.

“Good boy,” he praises breathily, hands tightening on his hips and pulling Grunk against him rougher. Grunk shivers at the feeling, mind going blank. All he can think to do is be good for him. A high-pitched whine falls from his lips.

“Yeah?” Isaac chuckles again, trailing off into another groan as his breath tickles Grunk’s ear slightly. “You want it?”

Nodding rapidly, Grunk buries his face into the crook of Isaac’s neck, kissing it softly. “Yes,” he breathes, back arching as the big hands trail along his hips before moving down further. “Please, need you.”

Isaac growls at his pleading, pausing his movements to quickly rid Grunk of his pants. His own follow shortly after, a small pile of clothes forming on the floor next to them. After they’re off and tossed to the side, his fingers reach up to Grunk’s mouth and work their way past his lips, attempting to get them slicked up.

Whining needily, Grunk lets his mouth fall open slightly, tongue coming out to rest on his bottom lip. He looks up at Isaac through his eyelashes, absolutely adoring the way his jaw tightens.

“Suck. This is all you’re getting,” he growls out, the other hand finding its way back onto his small hip and holding tight.

Grunk nods, eyes wide and heart racing as he takes them into his mouth further. Isaac groans at the sight, staring down at him like he’s the most important person in the world.
Even with the sexual context, Grunk can’t help the butterflies fluttering around his stomach at the loving glint, blush rising to his cheeks.

The sweet little moment is ruined as Isaac thrusts his fingers slightly, eyes darkening as the smaller gags and whines. Grunk’s whole body trembles at his look, overwhelmed at all the emotions he was feeling.

“So good,” Isaac murmurs, holding him gently despite the rough fingers infiltrating his mouth. He presses down on Grunk’s tongue, eyes glued to his to watch his reaction. The younger had to shut his eyes tightly to keep from gagging again, a few tears sliding down his cheeks at the repression.

Isaac groans at the sight, squeezing his hip and pressing down even rougher. This time, Grunk’s unable to hold back and gags harshly, even more tears leaking from his eyes. His entire body shudders at the action, saliva dripping down his chin. Letting out a high moan at the feeling, his eyes blink open slowly, meeting Isaac’s gaze once more.

The taller curses under his breath, staring into his eyes and loving the dumb, glassy look that’s overtaken them. Slowly, he removes his fingers, shushing Grunk as he whines at the loss. They carefully move down his body, leaving a wet trail as they go, before finally stopping right at his ass.

Whining once more, Grunk leans into the touch, pushing against his fingers. Isaac shushes him again, kissing his forehead. “Okay?” He asks softly, wanting to make sure everything was still wanted and okay with the other.

Grunk nods enthusiastically, tilting his head to lean into the kiss. “Yeah… please, I want you,” he mumbles, looking up at Isaac once more.

Isaac’s gaze doesn’t waver, staring down at the boy in his lap with all the love and affection in the world. “I love you,” he murmurs, pushing his fingers into him slowly.

His eyebrows furrow and his mouth drops open at the feeling, eyes fluttering briefly as Isaac’s big fingers fill him up. He started out with two, which Grunk definitely wasn’t complaining about. Looking at him with big, vulnerable eyes, he moans softly and grips the other’s shoulders tighter.

“I love you, too,” Grunk whispers, trailing off into a sharp gasp as his fingers push as far as they’ll go. Isaac’s own breath catches in his throat at the sight of him, heart pounding against his. With his unoccupied hand, he cradles Grunk’s face gently.

“My good boy,” he praises, thrusting his fingers slowly. Grunk leans into his touch, rocking his hips slightly. The praise makes his heart flutter once again, blush growing in intensity. Another soft moan falls from his parted lips, his whole body already feeling insanely sensitive and overwhelmed by Isaac’s touch.

“Your good boy,” Grunk gets out through little moans. “All yours.”

Humming, Isaac nods. He tries to keep the younger’s gaze, smiling softly at the way his eyes flutter. “So good,” he reassures, thrusting his fingers faster. Grunk feels the way his fingers crook upwards, brushing against the bundle of nerves inside of him

His heart pounds at the feeling, back arching and nails digging into Isaac’s shoulders roughly. A loud, slutty moan flies out of him as the taller focuses on exploiting that little spot. The feeling slowly begins to become overwhelming, eyes feeling too heavy to keep open and mind growing more hazy and fuzzy.

“Feels so good, so good,” he sobs, rolling his hips into Isaac’s hand. He holds Grunk close as he shudders, watching on in awe. Grunk’s eyes roll back as he adds another finger, back arching even more as he growls in response. The sensation combined with Isaac’s intense staring is almost too much for him; struggling to keep his eyes open as he slowly loses himself to pleasure.

Mind going completely and utterly blank, Grunk writhes in his lap, trying to get his big hands everywhere on his body. Isaac kisses his forehead gently and thrusts them in an even rougher pace, loving the way he cries out and holds onto him. The increased pace mixed with the softness from the forehead kiss almost has Grunk seeing stars. He can feel himself getting closer and closer to the edge.

“Yeah?” Isaac murmurs, eyes hungry as he watches Grunk lose control. His free hand squeezes his hip again, almost big enough to wrap around his torso completely. Grunk whines at the feeling, the size difference only fueling the fire. At this point, words are a lost cause. He can barely string together a small sentence, drool falling from his parted lips as he stares up at Isaac dumbly.

He hums again, thumb stroking along his stomach slightly. “You ready for more, baby doll?”

Grunk gasps and shudders at the pet name, nodding desperately in response to his question. He feels completely lost to pleasure, just sitting there and taking what Isaac gives him; willing to do anything for him at that moment.

Isaac groans in response, slowly removing his fingers. Grunk sobs at the loss, but allows him to do so, knowing full well this was the precursor to something much better. He’s maneuvered in Isaac’s lap easily, making sure he’s comfortable as the older’s cock presses up against him.

Shivering at the feeling, Grunk attempts to shove himself down onto him, only to be held back by Isaac’s giant hand on his waist. “Please, please, need you so bad,” he whines, almost incoherent with desperation. His thighs are absolutely trembling in anticipation.

“I’ve got you, baby boy, I’ve got you,” he reassures, holding him above his cock. Slowly, Isaac pushes in, groaning at the feeling of Grunk enveloping him.

Grunk gasps sharply, letting out a choked moan as he feels him slide in easily, fingers digging into Isaac’s shoulders. He stares down at where he’s carefully pushing in, eyebrows furrowing and mouth falling open at the sight.

“Good boy, just relax for me,” Isaac whispers, rubbing soothing circles into his hipbones as he struggles to stay put and not rush things. He murmurs soft praises into Grunk’s ear as he waits for hims to adjust, kissing his neck softly in between.

Already feeling wrecked, Grunk just whimpers and forces his body to relax on top of him. “More,” he sobs, looking up him through his lashes. “Please, Isy, need more.”

Losing what little control he had, Isaac growls and grips his hips with both hands. Using the grasp he had on Grunk to his advantage, he drags him up and lets him drop back down roughly. A whiny moan is pushed out of him at the feeling, eyes immediately rolling to the back of his head.

Isaac holds onto him tightly, picking him up and dropping him down once more. This time, though, he meets him halfway with a rough thrust. The feeling makes him groan. “So fucking good, sweetheart. All for me,” he pants against Grunk’s ear hotly.

Grunk can only respond with another choked-off moan, back arching against his grip. “Please!” he cries, falling limp against him as he complies. Loud squelching noises fill the air around them as Isaac thrusts up into him harshly, hands forcing him to just sit still and take it.

Pleasure washes over Grunk in waves, making him putty in Isaac’s hands. “Yeah, baby? You like that?” He growls into the smaller’s ear, sweat dripping down the side of his face as he uses Grunk like a fleshlight.

His arms flex as he easily pushes and pulls Grunk wherever he wants. Their size difference is glaringly apparent, a small bulge forming in his stomach as Isaac thrusts in. Grunk’s unable to do much more than gasp out little garbled noises and syllables that could almost resemble a ‘yes.’

Pulling himself together a bit, he forces his gaze to meet his, teeth clenches slightly as drool drips down onto Isaac’s chest. Grunk’s eyes are teary and vulnerable, hair bouncing against his forehead with every rough thrust upward. Feeling completely at his mercy, Grunk lets him move his body however he pleases, happy to be a good little toy for Isaac to play with.

“Yeah, fuck, so good,” Isaac grits out, staring into Grunk’s eyes lustfully. One of his hands moves from his small him to rest on his stomach, gently pressing down on the bulge that forms. Grunk bites his lip at the feeling, toes curling as he squirms against Isaac’s overwhelming touch.

Isaac grunts down at him, heart fluttering at Grunk’s expression. “So pretty,” he groans out, changing the angle of his hips slightly and hitting the bundle of nerves again.

Grunk practically screams, tears flowing down his cheeks freely as the overstimulation courses through his body. His heart is racing; vision fading for a moment before he comes back to his senses. He gazes up at Isaac, eyes half-lidded and pleading.

“Take it,” Isaac growls, unable to help himself. He moves Grunk faster, watching as his body bounces up and down, sweaty bangs now plastered to his forehead. Grunk’s eyes flutter, rolling around in his head uselessly, arms trembling as he moves them to wrap around Isaac’s neck instead, trying to just stay upright.

Small yeses are pushed out of him with each thrust, climbing in pitch. Each time Isaac moves him, it’s like another wave of pleasure crashes over him, body completely at his mercy.

“Such a pretty little thing,” Isaac groans, thrusting up into Grunk roughly. His hands are gripping the younger’s hips tight enough to leave bruises, the thought of seeing them tomorrow making his cock twitch inside Grunk.

The smaller moans at the feeling, curling in on himself slightly. “‘M gonna…” he trails off, unable to form words. Isaac holds him tighter.

“You gonna cum all over my cock, sweetheart?” He growls. Grunk nods quickly, head lolling back as he attempts to move with him. His breath is coming out in desperate gasps, moans turning into soft, needy whimpers as Isaac pushes him closer and closer to his climax.

Grunk’s entire body is trembling, and he can hardly keep his eyes open, lost in how good he feels from the other’s touch. Each thrust against his prostate has him moaning loudly, feeling as if his entire body is on fire. “Please,” he manages, looking up at Isaac dumbly.

Isaac growls again, one hand moving down to grasp Grunk’s cock firmly. “Do it. Cum all over my cock, precious. Show me how good I’m making you feel.”

The added pleasure immediately causes Grunk to tighten around Isaac’s cock, vision whiting out. A broken whine falls from his lips as he cums all over their stomachs, back arching and nails digging into his back almost painfully. His thighs tremble throughout his orgasm and his eyes are practically all white, rolled so far back it’s almost concerning.

Gasping harshly as he comes down from the high, he whines pathetically as Isaac growls and continues thrusting up into him roughly. Oversensitive, he begins to beg softly. “Please, too much,” he cries, moving so he’s right by his ear. “Please cum in me. ‘S too much.”

“Just a little more, baby doll, doing so good for me,” Isaac pants. At this point, Grunk’s mind feels completely broken, unable to form any coherent thoughts. He tries to say things, but all that comes out are desperate, needy little ‘please’s and ‘can’t’s.

Feeling Isaac’s cock twitch inside of him again, Grunk braces himself, biting his lip as he holds him down harshly. The taller pushes in as far as humanly possible, cumming inside of him. The rush of warmth causes him to whimper, clenching around his cock weakly.

Grunk nuzzles against his chest, sniffling as the tears finally begin to subside. His body continues to tremble, and he feels completely and utterly spent. Slowly, the pleasure ebbs away, leaving behind only a hazy, boneless feeling in its wake.

Isaac groans as he twitches inside of him again, aftershocks coursing through his body. He holds Grunk tightly, panting. “You did so well, baby, so well,” he praises, kissing the top of his head. Carefully, he lifts Grunk up, pulling out and sitting him back down onto his lap.

Humming, Grunk’s eyes stay closed. The urge to sleep is overwhelming.

“How about we get you cleaned up, hm?” Isaac whispers into his hair, hand gently rubbing Grunk’s back. The only response he gets back is a soft snore, making him chuckle.

He lifts the smaller gently, trying his best not to jostle him too much. Making his way to the bathroom, he quickly rinses Grunk and himself off with a wash cloth. After that’s done, he carries him over to their bed and lies him down softly, tucking him in securely and kissing his forehead.

“Love you,” Isaac mumbles, sliding next to Grunk and pulling him close. Once again, there was no real answer, but a small smile formed on his face at the warmth behind him.

They slept the night away peacefully, wrapped up contently in each other’s touch.