42
Existing sex robots were primarily designed for insertion and thrusting. But this dog—it licked with a desperation that made it seem almost feral. The realization that he was doing this with a real animal sent a wave of unease through Seungjun. The more his mind screamed this isn’t right, the more his erection refused to subside, shamelessly pressing against his stomach.
Seungjun reached beneath the dog’s belly, fingers trembling as they brushed through thick fur. He’d learned from experience—after mixing bodies with it multiple times—that a thick, red cock would emerge from that mass. Gripping it, he stroked the shaft, peeling back the sheath that covered it.
“Nngh… nn—”
The dog’s panting grew louder, even whimpering as it sensed the stimulation. Seungjun’s heart pounded—what if someone heard? What if they got caught?
“Shh… good boy…”
There was no turning back now, not after offering his ass. His palm slid over something slick and scorching hot. His chest heaved as he imagined the thick, heavy length—so different from a human’s—delivering a pleasure he couldn’t resist. Swallowing hard, he stopped the dog from licking him and carefully positioned himself, pressing his hips back until the tip of the dog’s cock brushed his hole.
He couldn’t believe he was doing this. But his body was desperate, screaming to be filled. The moment he guided the cock inside, the rest was easy. The dog seemed to understand—it planted its front paws on Seungjun’s back, climbing onto him. Seungjun arched his hips higher, spreading his own cheeks apart with both hands to let the monstrous cock sink deeper.
“Kh—hngh… uuuh…”
The pressure was nothing like a human’s. The dog was massive, and so was its cock. It sniffed and licked the nape of his neck, its rough tongue dragging along his spine as it began thrusting—fast, eager, its tail wagging. The movements weren’t as precise as a machine’s, but that only made it more thrilling.
Because it was real.
The thought that he was taking a dog’s cum inside him—something he could never undo—sent a shiver through him, but he moaned anyway. His own small cock dripped pre-cum, already on the edge even though they’d just started.
“Hah—ngh! U-uhhh—!”
His voice was animalistic now. From the very first time he’d been broken in with this kind of sex, his humanity had been stripped away. He had no other choice. His face ground into the cold cement, gravel scraping his skin, but he didn’t care. The dog’s cock raging inside him felt too good to stop.
“Nngh—hik, u—hngh…”
When the dog found his prostate and rammed against it, Seungjun came on the cement, whimpering. Tears streamed down his face—shame and pleasure twisting together, the depravity itself like a cock sucking him off. His own dick pulsed helplessly, leaking clear fluid as the dog’s relentless thrusts pumped cum deep inside him.
“I’m sorry… hngh—UHHAH—sorry, I’m sorry…”
Suddenly, his parents’ faces flashed in his mind—the way they’d smiled and told him to have fun camping, trusting him completely. Sorry, Mom… your son’s obsessed with dog dick, letting a mutt fuck him like a bitch. The confession dissolved into the air, not in human words but in broken, desperate moans, the occasional sorry tangled between gasps of pleasure.
Seungjun’s face burned as he rocked his hips, matching the dog’s rhythm, the pleasure intensifying. The dog barked behind him as it came inside, and Seungjun’s legs trembled—he’d actually done it. Before he could even catch his breath, the dog’s cock swelled, locking them together. The pressure inside him made him gasp. He couldn’t get off properly anymore without knotting.
Clear fluid dripped from his limp dick.
“Will!”
A loud voice suddenly cut through the tent. The owner—impatient—had called the dog’s name. Seungjun’s stomach dropped. If someone came out now, there was no escape. The dog’s cock was still buried inside him, the unmistakable scene of bestiality on full display.
“You damn mutt, fucking some random bitch again!”
The dog didn’t answer. It just panted, its cock still claiming Seungjun’s ass. The only mercy was that the man inside the tent had no idea his dog’s “partner” was human. Panicked, Seungjun crawled forward, the dog’s cock still inside him, and fumbled with the leash tied to the tent.
The owner stopped yelling when the noise died down. But Seungjun didn’t dare move too fast—what if the man came out? The dog’s claws scraped the cement. His palms were slick with sweat. Was he really stealing a dog now? The absurdity hit him, but he had every intention of tying it back up once he was done. The last thing he wanted was to get caught in the middle of this insanity.
He dragged himself—still impaled—toward a secluded spot. By the time he found a place where he could safely take it again, his knees and palms were raw. His body, unaccustomed to crawling after his brief return to humanity, ached. But the pain couldn’t dull the pleasure. He moaned, and the dog, sensing his need, mounted him again, its paws pressing into his back as it resumed fucking him.
The wet, squelching sounds were obscene. It wasn’t as perfect as the robot dog, but Seungjun didn’t care. Every thrust made his balls and cock sway, sending little sparks of pleasure through him. He bit his lip to stifle the noise—what if someone heard? The dog’s fur tickled his back, its slobber dripping everywhere.
“Hah—ngh, u—nngh! A-ah, uhhah—!”
He came again, cum splattering onto the grass, some landing on his knees and wrists. When he turned his head to check if anyone was watching, the dog lapped at his face. In the darkness, their illicit tryst was perfect. Seungjun shifted onto his back, the rough grass prickling his ass, but he didn’t notice. Now the dog straddled his chest, and he wrapped his legs around its waist, letting it sink even deeper. The dog’s tongue dragged across his face, tickling him.
In the shadowed darkness, their forms were indistinct. If someone saw them from the front, they might just look like a young man cuddling a large, affectionate dog. But below—hidden in the dark—their connection was far more intimate. The dog’s thick, long cock disappeared inside Seungjun over and over, his hole slick with cum.
“Hah… ngh—uuh, nngh—! A-hngh…”
The dog’s stamina was incredible. It kept going until Seungjun was too exhausted to even cling to it, reduced to lying spread-eagled beneath it, passively taking every thrust.
“Grr—keong!”
The dog barked deeply as it finished, its cock softening enough to slip out. Seungjun quickly got up—he couldn’t just stay there fucking forever. The dog’s cock was still tempting, half-hard, but he had to go. He crept back to the tent where the dog had been tied up and secured the leash again. Just as he turned to leave, the dog suddenly started barking loudly.
“Ugh, why’s it barking like that!”
The owner, fed up, shoved open the tent flap. Seungjun bolted, a sharp pain shooting through his lower back. He couldn’t stop—cum leaked from his ass as he ran all the way back to Hyeontae’s campsite, where Jihun and Hyeontae were already waiting.
“Uncle…?”
“What the hell, Seungjun, where’ve you been?”
The three of them—sitting around a campfire they’d lit for ambiance—turned to stare at him. Jihun looked tired but unharmed, and the ball was safely rolling near his feet.
“I went to… find Jihun…”
Only then did Seungjun remember why he’d gone to the campsite in the first place. His face burned as he mumbled the excuse. Hyeontae gave him a pitying look.
“Ah, you must’ve missed each other. Jihun was already here when I found him. Sit down, have a snack. We just finished dinner.”
Hyeontae had to have smelled the grass, dirt, and faint scent of cum on him, but he didn’t react. The only one who commented on Seungjun’s disheveled state was Hyeonjun.
“What the hell? Did you roll around in the dirt or something?”
“Uh… yeah.”
“You idiot. It’s pitch black out here.”
“I’m fine. Didn’t get hurt.”
As Seungjun sat where Hyeontae had gestured, he flinched—the cum inside him sloshed with the movement. Thankfully, neither Jihun nor Hyeonjun seemed to notice.
Hyeontae acted casual, but he already knew exactly what Seungjun had been doing. He’d sent him to the campsite on purpose, deliberately stalling by cleaning up Jihun to give Seungjun time. Waiting there was the latest, unreleased model of their sex-dog robot—designed to look indistinguishable from a real dog. The black dog Seungjun had just fucked, the one that had made him cross another line of his own depravity, was the robot. It had been modeled after an employee’s actual dog, and when the real dog died, they’d offered the employee a robot replica in exchange for using its likeness. A pet and a sex machine in one.
In the unlit, secluded campsite, Seungjun—his body burning, unaware it was even a robot—had surrendered to his own filth, confessing his sins to parents who would never hear him. The two boys who’d played along so perfectly were just the icing on the cake.
Author: Hyacinthus B
Hyacinthus
