29
“Ah—!”
Finally, the horse’s cock found its mark, stretching open his hole. The massive shaft slid in smoothly, lubricated by saliva. The sheer size of it made Seungjun’s face twist in pain as he wrapped his legs around the horse’s waist. His toes curled, and his body trembled, proof of the agony he was in.
“Kgh… uh… ah… ahh… ah, it hurts…”
The forced stretching burned, and Seungjun shook his head, trying to deny the pain. But the robotic horse didn’t stop. When he looked down to see how much more there was to take, he realized only half of it was inside him—and panic set in.
“Uh… hngh… unngh… ah… kgh… ah…”
Worse, the cock thickened toward the base. His legs spasmed as he tried to spread them wider. Tears welled in his eyes. Once fully sheathed, the pain mixed with a deep, shameful humiliation. Did he really have to go this far for pleasure? Self-loathing gnawed at him, making his head throb.
The robot, sensing he couldn’t take any more, slowly withdrew. His reddened hole gaped, dripping with clear lube. Just as the cock nearly pulled out completely, it thrust back in. This slow, deliberate pistoning repeated three times.
“Hah… ah… aah… ahh… uh… nngh…”
Every time the thick cock bottomed out, Seungjun gasped, his breath ragged. For ten days, his hypnotized craving for pleasure had warred with his human conscience, tearing him apart. But now, as the pain outweighed the pleasure, his mind tipped toward the latter. Tears spilled down his cheeks. He bit back a sob, his breath hitching—
Then the horse suddenly stopped.
“Hngh?”
The cock yanked out before slamming back in with brutal, relentless thrusts. Seungjun’s legs, draped over the horse’s flanks, trembled violently.
“Ah—! Nn… uh… ah! Ah, w-wait, hngh, ah—!”
The structure beneath him shook as the horse fucked him without mercy, its mechanical hips snapping forward. There was no gentleness—just raw, punishing force. The horse let out a low, rumbling whinny, licking Seungjun’s cheek and chest. In moments, he was drenched, impaled on the massive cock. His stomach bulged slightly with each deep thrust. His slender frame and the cock’s inhuman size only made it worse.
“Uh… kghuh… uwaah… ah! Ah! Hah… hngh… uh—!”
Pain and pleasure blurred together. One moment, he was in agony; the next, overwhelmed by ecstasy. Tears of self-hatred turned into tears of uncontrollable bliss. Seungjun clutched the horse, his legs locking around its waist, intensifying the brutal pounding. The cock was so long he could feel it writhing inside him. Alarms blared in his mind. His vision flickered white, then darkened, over and over. The violent motion forced him to cling tighter. His prostate, assaulted by the machine’s precision, couldn’t resist the stimulation. His swollen cock sprayed pre-cum like a fountain.
He was truly howling now, fucked senseless by the horse. Behind the glass, a man watched—Hyeontae standing beside him.
“Think this’ll sell? Seems a bit too niche.”
“With results like this, I’m sure it’ll do well if we market it right.”
“Impressive. Balancing a robot horse is one thing, but making it feel this heavy? That’s something else.”
“All thanks to your support, sir.”
“Good. What do you think? Isn’t Seungjun adorable?”
“Yes. The test results show he’s exceptionally sensitive. If we design a product around his preferences, it’ll be a hit—I guarantee it.”
“Keep him. Don’t let him go.”
Hyeontae’s order had been simple: break Seungjun down until he willingly worked for the company. The man had done just that, discovering Seungjun’s extreme physical sensitivity. There was no way he’d let him slip away now.
After days of conditioning, the moment of truth had arrived. The horse cum inside him once—a staggering amount, far more than the dog had produced. Seungjun’s lower half was drenched, his hole gaping and dripping cum. He lay sprawled on the structure, panting, his face flushed, his lips slightly parted in a dazed, decadent smile.
“Seungjun, we need your review.”
“Hngh… uh… hah…”
“Seungjun? If you can’t even handle one round with the horse cock, what’s the point?”
Seungjun could only gasp for air. The man clicked his tongue, smirking.
“Fine. Just answer yes or no. How was sex with the horse? Did you like it?”
“Uh… ah… nngh… y-yes…”
He could barely form the words, but his trembling lips satisfied the man. With a pleased grin, he made an offer:
“Want to keep testing the horse cock?”
“Hah… hah… yes…”
“Then from now on, we’ll replace your experiments with this. Oh, and this model’s temporary name is ‘Master.’ So call it ‘Master’ from now on… and we’ll tag you as its exclusive cum dump.”
The man held up a small yellow tag—like those used for livestock. He fastened it to Seungjun’s left nipple before dusting off his hands, satisfied.
“Suits you. Seungjun, the horse’s personal cum dump. Number 69. To celebrate your first time, how about one more round?”
The man pressed a remote into Seungjun’s hand. The machine powered on with a hum, the horse letting out another mechanical whinny.
“Uh… hngh…”
Seungjun’s shaking hand guided the horse’s cock back to his used, cum-drenched hole. It slid in easier this time, his stretched-open ass taking it hungrily. More cum leaked out as the shaft buried itself deep. His face lit up with bliss.
The structure creaked again as Seungjun rode it, the sound filling the room. The yellow tag on his left nipple fluttered more violently than his trembling body, already smeared with the horse’s saliva after just minutes.
His face was just as filthy—but his slack, lewdly moaning expression was pure, unbridled joy.
***
While Hyeonjun and Seungjun were at the company, Jihun was at school. His seniors had warned him not to exhaust himself in his first year—after all, he’d just have to retake everything after military service—but he didn’t listen. His goal was to get a job, fast. Money was always tight at home. Most students went to university, so if he wanted any kind of stable work, he needed at least a foot in the door of higher education. Even delivery or convenience store jobs now required some level of schooling. The media had once promised that robots would make life safer and easier, but what good was that when people were still poor?
Jihun sat in an empty classroom, waiting for his lecture to start. Even though it was only early summer, the heat outside was already unbearable. He’d rather be inside than suffer in the sun. Right now, even the slightest warmth made him irritable. He fidgeted with his phone, pretending to check the time, though he had nothing to do. His message drafts were filled with unsent texts—messages to Hyeontae that he’d written and deleted, over and over. Should he tell him he couldn’t do this anymore? That he wanted to quit? His cock, bound beneath his pants, ached. It had been over a month since he’d last cum. He couldn’t even get morning wood anymore, and his balls were painfully full, swollen with trapped semen. The slightest movement made thin fluid drip from the tip of his cock. His underwear was always damp, sometimes even soaking through his pants.
Realizing how serious this was, Jihun frantically searched online, though he already knew there was no new information. His search history was packed with entries about chastity devices. Reading about risks like penile necrosis made his groin throb in sympathy. Worse were the horror stories: Once you start controlled ejaculation, it becomes a habit—you’ll do it voluntarily. That wasn’t what he wanted to know.
Desperate, he’d even posted anonymous questions like “My dick keeps leaking fluid—what’s wrong?” The answers were useless: “Go to a hospital.” But how could he? The thought of explaining how he’d ended up like this made his throat close up.
“My friend’s dad said he’d hire me if I wore this chastity device…”
Hyeontae had promised him a job after just a little more testing, but a month had passed with no word, even as summer break approached. Jihun buried his face in his arms, remembering Hyeontae’s disappointed sigh: “Tsk. Guess you don’t have the stamina after all.” He’d held out, but now he was at his limit.
There was another reason he couldn’t go to the hospital. His obsession with his cock had grown uncontrollable. He’d felt similar cravings before, but now it consumed him. He’d never once identified as gay in his life—yet lately, he couldn’t stop staring at men’s crotches, imagining the shape of their cocks beneath their clothes. His mouth watered at the thought of taking a thick shaft into his mouth, parting the slit with his tongue, sucking until he gagged. He loved the idea of heavy, swinging balls—licking each one in turn, tasting the salty skin. The rougher and more unkempt a cock was, the more he craved it. He wanted to bury his nose in a thick bush of pubic hair, take the whole length into his mouth, and let it fuck his throat.
Author: Hyacinthus B
Hyacinthus
