Work Text:
Gunwook’s glasses slip down the bridge of his nose again, and he pushes them back up with an impatient sigh.
Why is this so hard? he thinks, his eyes scanning the same paragraph about human body functions for the third time. His tail twitches restlessly behind him, betraying his struggle to focus. The exam is tomorrow, and he has to get this right. Human anatomy isn’t exactly intuitive for a dog hybrid, but Jiwoong, their owner, has always encouraged them to pursue their passions, no matter how unconventional they seem to others.
“Gunwook,” comes a whining voice from behind him, and he doesn’t need to turn around to know what’s coming. Gyuvin. His fellow hybrid, his other half, currently—his distraction. Gunwook’s ears perk up, swiveling toward the sound, but he forces himself to keep his eyes glued to the page. Focus.
But then he feels it—the warmth of Gyuvin’s body pressing against his back, the older pup’s head nuzzling into the space between Gunwook’s nape and shoulder blade. His breath hitches as Gyuvin’s ears brushes against his skin, sending shivers down his spine.
No. Not now. He clenches his jaw, willing himself to stay still, to not move. Gyuvin’s hips begin to move in slow circles, grinding against the back of his thigh, and Gunwook can feel the hard press of the other’s arousal against his skin. Of course, Gunwook had to wear shorts to bed. East accessibility to most skin.
Each shift of the older pup's hips presses Gunwook’s own cock harder into the mattress, the rough sheets rubbing against his sensitive skin. He bites his lip to stifle a moan, his tail stilling as his body involuntarily responds. Gunwook bites his lips to not let out a moan, the way every part of Gyuvin that touches his skin leaves a trail of goosebumps behind them.
“Gyuu,” Gunwook finally manages to say with a strained whine. “I have an exam tomorrow.”
Gyuvin hums, his voice muffled against Gunwook’s skin. He doesn’t stop. His movements become more insistent, his breaths coming in short pants—warm puffs of air against Gunwook’s neck.
The younger hybrid can feel his own cock chubbing up, the combination of the grinding and the needy whines escaping Gyuvin’s lips making it impossible to ignore. His grip tightens on the textbook, knuckles whitening as he tries to ground himself.
Really, he tries to focus, his eyes reading the lines in front of him, trying.
And then one line in the paragraph he tries to grasp at catches his eye.
Did you know the human anus can stretch up to 7 inches before taking damage!?
It’s then the stupid idea gets registered in his brain.
His brain, already struggling to focus, latches onto the absurdity of the statement. Seven inches? He glances down at his hands, holding them up as if trying to measure the distance. That’s a lot. Almost as large as his dick. His cock and tail twitch at the thought again.
His mind begins to wander, images flashing—Jiwoong. Their owner. Jiwoong spread across the bed, ass up, ready and willing, his hole stretched and open for taking. Oh. The thought sends a jolt of heat straight to Gunwook’s groin.
He and Gyuvin have tried before. Both of them have taken turns with Jiwoong and even with each other. Tried to go past more than finger up their ass, but, their bodies are simply too tight, even with lube. Gunwook had even begged Jiwoong to just force himself through once, despite the tears streaming down his face from the pain, but Jiwoong had refused. “I’m not going to hurt you, pup,” he had told them with a kiss. “You can use me instead.”
A sharp whine and the telltale wetness landing on the dimples at the base of his spine pull him back into the present moment. He turns his head just a bit to see Gyuvin standing on his knees behind him. The older hybrid is fisting his cock, his eyes fixed over every inch of Gunwook’s body—tracing each muscle and the warm golden skin, while his hand keeps milking his cock.
The warmth of the cum seeping into his skin goes straight to Gunwook’s cock. He presses himself down into the mattress again, humping into it in time with Gyuvin’s hand.
Gyuvin’s hands are so big, just like his cock, and suddenly Gunwook’s mouth is watering.
-
Exactly three minutes later, every thought of the test is off Gunwook’s mind as his lips are around Gyuvin’s cock, until the cockhead touches the back of his throat.
“Fuck, wookie," Gyuvin’s voice is a low growl, slipping through his canines, his hand tightening in Gunwook’s hair as he pushes him down further on his cock. “So good, baby.”
Gunwook’s lips stretch around Gyuvin’s thick cock, tears brimming at the corners of his eyes as the tip hits the back of his throat again and again. His nose brushes against the leftover fur—yes they have a fur trail, just like a human's happy trail made of pubs and hair—that trails down Gyuvin’s abdomen, the musky scent of him overwhelming his senses. He can feel the wetness of his own saliva dripping down his chin, the strain in his jaw as he tries to accommodate Gyuvin’s size.
Gyuvin’s other hand grips the edge of the bed, his claws digging into the wood as he groans, a deep rumble that vibrates through Gunwook’s skull. “You’re doing so good, just like that.”
Gunwook can feel the way Gyuvin’s hips twitch, the way his cock throbs in his mouth, and he knows he’s close.
His hands cling to Gyuvin’s thighs, his fingers sinking into the thick muscle as he tries to steady himself. His throat relaxes as he takes Gyuvin deeper, his nose now fully pressed against the other's stomach. Senses full of Gyuvin. On his tongue, in his lings, everywhere.
The taste of his precum clinging in his throat is salty and Gunwook can’t get enough. He hollows his cheeks, sucking hard as he pulls back, then plunges down again, his tongue dragging along the thick vein on the underside of Gyuvin’s cock.
Gyuvin’s voice is full of whine now, his hips bucking up uncontrollably. "Fuck, I’m gonna—" His voice broke off into a snarl, his claws ripping through the wood of the table as he came, his cock pulsing in Gunwook’s mouth.
The first spurt hit the back of Gunwook’s throat, and he swallows instinctively like always, his throat working around Gyuvin’s cock as more and more of it pressed into his mouth.
Gyuvin’s grip on his hair loosened, his body trembling as he rode out his orgasm. Gunwook didn’t pull away, his lips still wrapped around Gyuvin’s cock as he sucks him through it, milking every last drop. When Gyuvin finally goes limp, Gunwook leaned back, licking his lips as he looked up at him, his eyes glazed, yet looking at Gyuvin expectantly and his cheeks flushed. His ears turned up and tail against the floor.
Gyuvin raises an eyebrow, his own ear twitching. Gunwook never prostates like this in front of them until he has something to say. Or to do. He moves his fingers across Gunwook's hair again, scratching across the younger puppy's ears and humming. A silent permission to ask.
Gunwook licks his lips before—
"So...there is this thing I read."
-
It's around 11 at night when Jiwoong returns home, utterly exhausted from work. His shoulders slump under the weight of the day, and the constant buzzing in his ears refuses to quiet down.
Work, work, work—it’s all he’s been consumed by lately. As he steps inside, he calls out for his puppies, but the house is dark, the lights off, and the TV silent. He frowns, a flicker of concern crossing his face, but the fatigue quickly overtakes him again.
The need to collapse into bed is overwhelming, and he doesn’t even bother changing out of his work clothes. He kicks off his shoes haphazardly by the door and flops onto his bed, face down. Within minutes, he’s passed out.
Outside the door, Gyuvin and Gunwook exchange glances as Jiwoong’s snores echo softly into the hallway. They creep into the room then, their movements careful and deliberate. Gyuvin’s sharp eyes scan Jiwoong’s sprawled form, sleeping on his stomach—his tie still loosely knotted around his neck, his dress shirt half-unbuttoned, and his breathing steady. The man is completely drained, his body heavy with sleep.
Gyuvin smirks, his tail swishing lazily behind him as he leans against the doorframe. He glances back at Gunwook, who lingers in the hallway, his fluffy ears twitching nervously. Gunwook’s arms are crossed, his tail curled around his leg, and his golden eyes dart between Jiwoong and Gyuvin.
“You’re really going to do it?” Gunwook whispers. As if he wasn't the one who put the idea forward.
'You're cock is 3 inches wide, mines 3—'
'2 and a half.'
'..2 and a half inches wides. Let's see if Jiwoong can take both together. It's just 6—'
'5 and a half inches.'
'Fucking whatever. It's somewhat 6 inches, less than how much a human anus can take so much why not—'
And thats what landed them here.
He shifts his weight from one foot to the other, his cheeks flushing slightly. “We talked about it, yeah, but..he’s asleep, Gyuvin. What if he wakes up and—?”
Gyuvin rolls his eyes. Oh his other half is such a sly dog. The mastermind who likes to play dumb. “What? You’re scared now? After all that talk about wanting to see of that line is true or not?” He steps closer to Jiwoong with each word.
Gunwook’s ears flatten against his head, his tail flicking nervously. “I’m not scared,” he mutters, though his voice betrays his hesitation. “I just, we should’ve waited for him to wake up. What if he doesn’t want this?”
Gyuvin kneels beside the bed, his sharp eyes glinting in the dim light. “He’s not going to mind,” he says confidently, “You know him, Gunwookie. Remember ” he adds with a sly grin, “he had told us last time, we can use him. Anything."
Gunwook stays rooted in the doorway, his sharp eyes darting between Gyuvin and Jiwoong’s form. He swallows hard, his hands fidgeting at his sides. Gyuvin, meanwhile, is already in motion.
He gently pushes Jiwoong’s legs apart, his fingers trailing up the inside of his thigh. His touch is light as he tugs Jiwoong’s pants down just enough to expose the curve of his ass.
“You’re really going to—” Gunwook starts, his voice catching in his throat as Gyuvin gives him a pointed look to be quieter.
“Watch,” Gyuvin whispers. He leans down, his breath warm against their owner's skin as he presses a soft kiss to the small of his back. Jiwoong doesn’t stir, his breathing still even. Gyuvin grins, his tail flicking with excitement.
He reaches for the bottle of lube he’d brought with him, squeezing a generous amount onto his fingers. The slick sound of it makes Gunwook’s ears twitch, his face burning even hotter. Gyuvin doesn’t hesitate, his fingers sliding down to circle Jiwoong’s entrance. He presses the tip of one digit against it, feeling the heat of the against his it.
“Relax,” Gyuvin murmurs, though he isn’t sure if he’s saying it to Jiwoong who can't even hear him or himself so he doesn't get too excited. He pushes in gently, the warmth of the other's walls enveloping his finger as he works it in slowly. Jiwoong lets out a soft sigh, his body shifting slightly. Gyuvin’s smirk widens, his ears twitching, Gunwook watches too, his tail straight in anticipation. For what, he doesn't know.
“Look at that,” the older pup teases as he glances over his shoulder at Gunwook. “He’s not even awake, and he’s already taking it so well. Come closer, Gunwookie. Don't use wanna see better?”
Gunwook hesitates, his heart pounding in his chest. He takes a step forward, then another, until he’s standing at the foot of the bed. His eyes are locked on Gyuvin’s fingers, watching as he adds a second digit, stretching Jiwoong open with ease.
“He’s so tight,” Gunwook's voice hold a tremble, his ears twitching. He can’t tear his eyes away, his tail sways nervously behind him. “Ho—how many more can you fit?”
Gyuvin chuckles, the sound low and rumbling, vibrating through the room. “Let’s find out,” he says, while adding his third and fourth finger, the stretch making Jiwoong’s hole clench tightly around him, making Jiwoong’s breath hitch even in his sleep. His moans grow louder, his body arching slightly as Gyuvin presses deeper, searching for that sweet spot.
“Nghh," Jiwoong’s voice is soft, almost inaudible, but it’s enough to make Gunwook’s ears perk up.
“Hyung?” Gunwook whispers. He’s awake.
Jiwoong’s eyes flutter open, his gaze bleary as he turns his head slightly. His lips part in a soft gasp, his body still arching as Gyuvin’s fingers press against his prostate. “wook-ah” he breathes out,“What’s— what’s going on?”
Gunwook freezes, his face burning with embarrassment. His ears flatten against his head, and his tail stills completely. He opens his mouth to apologise maybe, but before he can get the words out—
“Curiosity got the better of us,” Gyuvin says, unapologetic. He leans down, his lips brushing against Jiwoong’s nape, sending a wave of goosebumps across his skin. “You don’t mind, do you, hyung?”
Jiwoong’s breath hitches, his eyes fluttering shut as Gyuvin’s fingers continue to work him open with ease. His mind is foggy, exhaustion from the long day of work still clinging to him, but the pleasure coursing through his body is electric, overwhelming, somehow the constant buzzing in his ears is silent now. He doesn’t have the energy to protest, not that he wanted to.
“I—I..” Jiwoong stammers, his body feels like it’s floating, weightless, as if he’s being carried away by the waves of pleasure. He’s too tired to think, too tired to do anything but give in. It feels so good. "it's 'kay," it's too soft yet the puppies sensitive ears pick it up.
Gyuvin smirks as he glances at Gunwook. “See? He’s fine with it.”
“but hyung’s tired,” Gunwook protests. He’s hovering awkwardly, his hands fidgeting at his sides, unsure whether to back away or move closer. His protective instincts are at war with the heat pooling low in his belly.
Jiwoong’s hand reaches out, his fingers brushing against Gunwook’s wrist. “S’okay,” he murmurs, his voice drowsy but sincere. His touch is enough to make Gunwook’s resolve crumble, the younger hybrid’s breath catching in his throat. “Tired... but feels good.”
Gyuvin’s smirk widens, his fingers curling just right to make their owner let out a high pitched whine, Jiwoong’s back arching off the bed. He shifts slightly, his other hand running up Jiwoong’s side in a caress. “Now, are you going to keep standing there, or are you going to join in?”
Gunwook’s ears perk up at the challenge, his tail wagging slightly despite his lingering hesitation. He looks down at Jiwoong’s flushed face, his heart pounding as he takes in the way his hyung’s lips part in a soft moan, his body trembling with pleasure. The sight is intoxicating, and Gunwook’s resolve crumbles completely.
“Hyung" Gunwook asks leaning closer until his forehead presses against Jiwoong's , “Are you really okay with this?”
Jiwoong’s breath hitches, both at the softness in the younger's voice and as Gyuvin’s fingers press deeper inside him, his body shaking against the sheets. He nods weakly. “As long as...as long as I don’t have to do anything,” he slurs out.
Gyuvin chuckles again, his teeth grazing against Jiwoong’s neck in a playful bite. “Don’t worry, hyungie. We’ll do all the work.”
Gunwook kisses their owner's lips softly as Gyuvin moves, his fingers finally pulling away from Jiwoong’s entrance making the human whimper into the kiss.
“See wookie? He’s more than okay with it.” The older pup say as he watches his lovers pull back after the kiss . He reaches for the lube again. “Now,” he says, his gaze locking with Gunwook’s. “Let’s test that question of yours, Gunwookie.”
Gunwook’s breath hitches, his eyes wide as Gyuvin hands him the bottle of lube. “You—you want me to..?”
Gyuvin grins, his tail coiling into itself lazily behind him. A sign of his mood. Mischievous. “Only if you’re ready,” he teases. “But I think you want to. Don’t you?”
“I.." Gunwook hesitates, his hands tightening around the bottle of lube. He glances at Gyuvin, then back at Jiwoong, his resolve hardening. “Okay,” he whispers, "let’s do it.”
Gyuvin’s grin widens, his canine teeth glinting in the dim light of the room. “That’s my Gunwookie,” he says as he shifts back, giving Gunwook space to move closer to Jiwoong. “Go on. He’s ready for you.”
Gunwook’s fluffy ears twitch nervously, his tail flicking behind him as he steps forward. He kneels beside Jiwoong in the same space the older hybrid was moments ago, his hands trembling slightly as he reaches out to touch him. Jiwoong’s body is warm, his skin slick with sweat and lube, and Gunwook can feel the faint tremor running through him.
“Hyung,” Gunwook asks again, “is this really okay?”
Jiwoong reaches behind him, his hand brushing against whatever part of the other he could touch, “Gunwook-ah, it's okay. I want this. I want you.”
Gunwook’s resolve solidifies at Jiwoong’s words. He nods, his hands steadier now as he positions himself between Jiwoong’s legs. He can see the way Jiwoong’s hole twitches around nothing, is already stretched open from Gyuvin’s fingers, and his heart races at the thought of being inside him.
Gyuvin watches, his tail flicking lazily behind him as he leans against the wall. “Take your time, wookie, but don’t keep hyung waiting too long now.”
Gunwook’s ears twitch, his cheeks flushing a deep shade of red.
“Hyung,” A question is laces in that one word. His hands shaking as he grips the older man’s hips. The heat radiating from Jiwoong’s body is almost suffocating, and Gunwook can’t stop the way his own breath hitches.
“Go slow baby.. hyung's a bit tired" Jiwoong slurs out, his hands clutch at the sheets, his knuckles turning white as he tries to relax. “Just take it easy, okay?”
Gunwook nods, his tail wagging nervously behind him. He takes a deep breath, then guides the tip of his cock to Jiwoong’s entrance. The first press is slow, and Jiwoong’s breath catches in his throat. His body tenses for a moment, but he forces himself to relax, his legs spreading wider to accommodate Gunwook.
“Fuck..,” Gunwook whimpers. The tight heat of Jiwoong’s body is overwhelming, and he can’t stop the small sob that escapes his lips. He can feel every inch of himself sinking into Jiwoong, and the sensation is almost too much to bear. Tears prick at the corners of his eyes, and he blinks them away, his grip on Jiwoong’s hips tightening.
“Hyung-ah, you’re so—” Gunwook’s voice trails off, the words dying in his throat. He can’t think, can’t breathe, his entire world narrowing down to the incredible feeling of being inside Jiwoong. His hips stutter, and he thrusts in deeper, his tail rigid.
Jiwoong’s hand reaches behind him for Gunwook’s, their fingers tangling together as the younger pup’s hips continue to thrust into him. Jiwoong’s forehead presses into the mattress, his breath coming in shallow gasps as he tries to hold on. “Doing so good, baby, S'good. Making hyung feel so good.”
Gunwook’s breath hitches, and his tears spilling over as he continues to fuck himself into Jiwoong. His entire body is trembling, his heart racing as he loses himself in the sensation. He can’t stop the way his hips move, each thrust driving him deeper into Jiwoong’s tight heat. His cock head bruising the older man's prostate with each slip in, making him gasp and bite the mattress below him. A pool of Saliva gathering.
Gyuvin watches from the sidelines, his smirk growing wider as he sees the way Gunwook is falling apart. He steps in then, looking down at Jiwoong. “Don’t forget about me, hyung,” he purrs. “You’ve got two pups to take care of.”
Gunwook’s ears twitch, and he glances at Gyuvin, his cheeks flushing even darker. He doesn’t stop his movements, just makes his thrusts still slow and steady, grinds into the deepest part of Jiwoong, as he looks at the other hybrid. “What do you want me to do?"
Gyuvin he steps closer, his hand reaching out to pat Jiwoong’s waist. “Lift him up, I want him on top of me.”
Gunwook hesitates for a moment, then wraps his arms around Jiwoong’s waist. He lifts him up easily, until Jiwoong’s back presses against Gunwook’s chest, and their human lets out a soft moan as Gunwook’s cock presses deeper into him from this angle.
“Fuck” Jiwoong breathes, his head falling back against Gunwook’s shoulder. His entire body trembling.
Gyuvin lays down on the bed. He gestures for Gunwook to deposit Jiwoong on top of him, and Gunwook does so carefully, lowering Jiwoong onto Gyuvin’s lap, making sure the younger puppy is inside him all the time.
Jiwoong’s breath catches in his throat as he feels Gyuvin’s cock pressing against his thigh and Gunwook's hips grinding down onto his sweet spot, his cock jumping.
“Relax, hyungie,” Gyuvin murmurs, his hands gripping Jiwoong’s hips over Gunwook's hands. He leans up, pulling Jiwoong into a soft kiss. More of a distraction while his hand guides his cock into the other, alongside Gunwook's.
Jiwoong’s moan is muffled against Gyuvin’s lips, his hands gripping the hybrid’s shoulders as Gyuvin pushes his hips up, pressing his cock into Jiwoong’s tight heat as well.
“Fuck, hyung, you’re so tight”
“S'good,” Jiwoong breathes. His body feels like it’s on fire, every nerve ending alight with pleasure as both hybrids continue to thrust into him.
Gunwook’s tears are streaming down his face now, his sobs mingling with Jiwoong’s moans as he continues to thrust into the older man too.
“Hyung-ah, it’s so—it’s so good..,” he whimpers, his voice breaking. His hips stutter, his thrusts becoming more erratic as he chases his release.
Gyuvin’s breath too comes in shallow gasps, his lips pressed against Jiwoong’s neck, biting and sucking every inch of skin he can find, as he continues to thrust into the human. “So fucking good.”
Jiwoong’s body trembles, his legs wrapped tightly around Gyuvin’s waist and leaning back a bit against Gunwook's chest titling his head to give the younger puppy more skin to work his teeth on as well.
As both hybrids continue to fuck into him. His mind is blank, his entire world narrowed down to the sensation of being filled by both his puppies. His moans grow louder, his body trembling as he feels his orgasm building.
“I’m gonna—” Jiwoong’s voice trails off, his body tensing as his orgasm crashes over him. His cum spills onto Gyuvin’s stomach, his body trembling as he sobs through his release. Gunwook and Gyuvin aren’t far behind, their thrusts growing more erratic as they chase their own orgasms.
“Hyung-ah” Gunwook whimpers. His hips stutter, his cock pulsing inside Jiwoong as he spills his release. Gyuvin follows suit, his breath hitching as he fills Jiwoong with his cum.
One of Gyuvin's hand wrap around Jiwoong's cock then and make him cry out as it moves over his sensitive member, milking him on while continuing to fuck their cum inside Jiwoong.
-
Five minutes later, when the shared mess and tangle of limbs start to detach themselves, Gunwook cries again.
"I am so fucking failing tomorrow."