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Now he understood why the company advertised itself as “responsible for your sexual health.” The equipment in the gym was undeniably lewd and bizarre, but it never let users indulge too much or drown in pleasure. The fitness band strictly guided workouts for one purpose: enhancing sexual sensitivity and physical development. It even analyzed bodily changes to suggest the next exercise.
Following the band’s instructions, Hyeonjun moved to the next machine. This one was for increasing nipple sensitivity and milk production. His nipples were already swollen and plump from long-term piercing use, though he no longer wore them—just nipple patches to catch the constant leakage. The band instructed:
[Please sit in front of the machine.]
Several men were already seated beside him, all with breast pumps attached to their chests, faces flushed. Unlike Hyeonjun, their bodies were sculpted from muscle, not piercings. The man next to him even had a nipple piercing and a breast pump, his expression twisted in pleasure.
“Like… this?”
Hyeonjun pressed the pump to his chest. His developed nipples were erogenous zones, but they didn’t bring the same direct pleasure as his ass. He’d been conditioned to enjoy being filled—insertion was his real weakness.
He didn’t understand why these burly men were panting like this over a mere glass cylinder. It wasn’t even fucking their asses, yet they moaned, cocks stiff, as the translucent, cylinder-shaped pump sucked at their nipples. When Hyeonjun secured it, the hose attached to the pump began drawing air. His already swollen nipples swelled further under the pressure.
“Ngh…”
A sharp, tingling sensation shot through both nipples. It felt like something was piercing them—impossible, yet undeniable. His oversensitive chest reacted to the slightest stimulus, forcing a whimper from him. Only when he looked down did he see why.
“Hngh… n-no, h-huh, ah… this is weird.”
[Please remain still.]
Inside the cylinder were tentacles. Thick, branched tips wriggled deep into his nipples, burrowing and twisting. The burning sensation gave way to an itchy, electric tingling—almost cooling, like stepping away from a scorching fire. His back arched involuntarily. Every time he squirmed, the fitness band ordered him to stay in position. He couldn’t escape, couldn’t stop—just had to endure the relentless nipple development.
“Ah, hngh, uugh—! S-stop, w-wait, nngh—!”
He tried to stifle his sounds, but it was useless. The itching grew unbearable, making him want to touch himself. His slender thighs trembled, toes curling against the hard floor as he gripped the chair. His cock was rock-hard, nearly pressing against his stomach.
This was a new kind of pleasure—different from the brutal anal ravaging and forced ovulation he’d endured. The tentacles bit—tiny teeth nipping at his nipples, sending sharp pain that only made him writhe more. His milk dripped steadily, the company’s enhanced chest now leaking at the slightest pressure. The tentacles lapped it up greedily, tongues flicking like they were licking him. The semi-transparent design suddenly made sense.
The men beside him made similar noises. One groaned, hands kneading his own chest, cock throbbing as he arched his back. Hyeonjun shared that sensation—the way his spine straightened on its own, muscles rippling with sweat.
“Hyeonjun, finishing up your workout?”
Jihun, freshly done with his own session, spotted him and approached. Hyeonjun could only pant and shake his head, overwhelmed. The pleasure bordered on pain—every time he tried to resist, another wave of sensation crashed over him.
“Looks like you’re enjoying it… But you forgot a condom. If you cum like this, it’ll be a mess.”
There’s a fine for soiling the equipment. It’s shared, so keep it clean, Jihun muttered, kneeling beside him. He glanced at the man on Hyeonjun’s other side—also lost in pleasure, cock leaking—and his eyes darkened with quiet hunger. He’d been sucking dick nonstop in the office, but transfers could happen anytime.
“Hyeonjun, if you cum now, you’ll owe a fee. Let me help.”
With a smirk that bordered on wicked, Jihun took Hyeonjun’s cock into his mouth. The sudden, wet heat made Hyeonjun’s head snap back, a choked gasp escaping. Jihun worked his tongue with practiced skill—plenty of experience from servicing men in the office. Hyeonjun, unaccustomed to receiving blowjobs, clutched the chair, trembling.
“Nngh, m-mph, hah—!”
Not satisfied with just one, Jihun also grabbed the cock of the man beside Hyeonjun, who was nearing the end of his own “development course.” He stroked it firmly, adjusting pressure as he jerked him off. The man bucked wildly, unable to handle the dual stimulation.
If Hyeontae had seen this, he’d have praised it as “the fruition of college friendship.” Before the nipple machine even stopped, Hyeonjun came in Jihun’s mouth—his second orgasm. The lingering nipple stimulation made his body jerk violently. The cylinder was half-full with milk the tentacles hadn’t drunk—proof of how aroused he’d been, and how effective the machine was.
Jihun savored the cum before swallowing, still stroking the man beside them. His fingers teased the head, rubbing and twisting like a self-pleasuring motion. The man, unable to even swallow his own spit, was lost in back-to-back orgasms, his mind blank with euphoria. Jihun licked a stray drop of cum from his lips, then pressed a quick kiss to Hyeonjun’s cockhead before pulling away. Their eyes met—Jihun winked, then stood. The man beside them had already cum twice from Jihun’s handjob.
“Hah… haah…”
While Jihun chatted with the man, Hyeonjun’s workout ended. The fitness band delivered its dry congratulations:
[Congratulations! You have completed Day 1 of your workout!]
Instructions followed on how to finish the remaining exercises and manage his body. Hyeonjun barely listened, slumped in the chair. He felt drained, like he’d done nothing yet lost all his energy. Jihun waited beside him, then nodded toward the exit—time to go.
“Damn, look at Shin Hyeonjun in the shower—what a sight!”
Jihun whistled. He loved working out—the post-exercise shower always left him refreshed, brimming with vitality. Hyeonjun, however, was different. He stood under the water like a drained battery, leaning against the wall, empty.
“Seriously, how do you even have sex looking this weak?”
“Shut up… I’m pregnant, it’s exhausting…”
“Oh right, you are… But that’s more reason to push yourself! Isn’t it?”
“…Just shut the hell up, you workout-obsessed freak.”
Hyeonjun turned off the water and towelled his hair dry. He hadn’t worn clothes to begin with, so no need to change.
“I’m gonna finish up in the office… change and head out. You?”
“Meeting Seungjun… then going home with Dad.”
“Oh right, camping. Got it. See ya, catch you later!”
Jihun’s words sounded like a promise to meet again in the gym. Hyeonjun just waved, too exhausted to respond. This hadn’t even been a planned workout. The intense pleasure was great, but it left him more drained than actual sex. He blamed the machines as he stepped out of the elevator, grumbling.
“Stupid bike pedals…”
Author: Hyacinthus B
Hyacinthus
