Urethra Training in the Urethra Education Room
The Urethra Training Room. Like the other spaces, it was a cramped room of about five pyeong, stocked with an array of tools for training. The shelves lining the walls held various urethra beads designed to effectively wreck a urethra—from the exceedingly thin ones a beginner might use... to ones so thick it seemed impossible they could fit. Twenty types in all, each varying in size and shape. If Heo Seong-ah's condition was favorable, all twenty would be put to use on her today.
"B62, just go in and sit down. Understood?"
"Y-yes, Manager... hic..."
She had finally succeeded in expelling the anal plug, but instead of the rewarding, blissful climax she had earned as a prize, the moment had arrived for the urethral modification she dreaded more than anything. The despair crashing over her went without saying.
"Hnng..."
Deep down, she wanted to bolt—burst through the door, tear off the suit clinging to her body, and plunge her fingers vulgarly into her pussy for a frantic wank. But with her vision blocked and her sense of direction obliterated, there was nothing she could do.
"Get up and sit in the chair. Now."
"Y-yes..."
Guided by the Manager's hand, she reached the center of the room. As she kept walking blindly, her head bumped into something with a thud, halting her. Groggily reaching out, she realized there was a chair right in front of her and lowered her ass onto what felt like a saddle.
"Huh...?"
She thought it was a chair, but there was no backrest. Doubting if this was right, she stretched her hand behind her and felt a soft leather sheet extending straight back from under her ass in a line. Slowly reclining until her head met it, she found armrests branching out to either side at shoulder level. Her legs were the same—resting them on the footrests that stretched downward made her body splay out like a giant dae character.
Was this a chair or a bed? As that thought crossed her mind, the Manager—who had finished his preparations—approached and secured her limbs firmly. He locked her waist and thighs to prevent movement, then bound her neck and head with rubber bands so she couldn't lift it.
"Nnngh..."
Now, only her fingers and toes could twitch. Being restrained like this was routine by now; she was used to it. The problem was not being able to see what was coming next... That vague terror made Heo Seong-ah's body tremble.
"B62, are you scared? No need to be so frightened. The urethra training will be over quickly."
"Y-yes... y-yes..."
Urethral modification was purely for "fun." Unlike the asshole, you couldn't shove a cock in there or handle it roughly—it was a delicate bundle of nerves. All it took was tweaking it just a bit... turning it into a toy the owner might enjoy, and the modification was done.
Clatter... clatter...
In the awkward silence, the sound of tools rattling in a box teased her ears. The Manager wheeled over a chair and sat between Heo Seong-ah's spread legs. To an outsider, it might have looked like a patient and doctor at the gynecologist.
"Hik!"
A large hand approached silently and pressed firmly between her thighs. He parted the upper section of the suit slightly to expose her urethra, but given a woman's anatomy, locating the tiny hole wasn't easy. In the end, he spread her pussy wide open and gently pulled the slick, sopping entrance apart to find the urethral opening.
"Ghk... hnng..."
Just the touch on her sensitive spots made Heo Seong-ah's body jerk and quiver with pleasure. Her hole clenched as if begging to be fingered... but for now, nothing but the urethra would be touched.
The Manager pulled out a small plastic ring and pried her pussy open with it. The ring caught the edges of the hole that kept trying to close, spreading it wide to expose the pink inner folds, the urethral opening, and the clit hidden within the hood. Every twitch of her pussy sent a lewd trickle of arousal leaking out.
He almost reached out absentmindedly to touch it but reminded himself of the training's purpose, steeling his resolve as he turned his hand toward the urethral hole instead.
"Hngk!"
The tiny urethral opening—so small even a cotton swab would struggle—got mercilessly rubbed and stimulated by his finger.
"Kkuuuh..!"
Each light stroke up and down sent her lower body spasming. It wasn't quite pleasure... more like the precarious sensation of a full bladder on the verge of leaking.
"B62, what are you feeling right now?"
"Ghk... hnng... It feels like I'm gonna pee..."
"Hmm... I see."
She had been squirting all day, so he wondered if her urethra was already ruined before modification even began—but it was needless worry, as expected. After checking her urethra, the Manager took a thin rubber tube from the box and coated the tip with lube.
"Inserting now. Relax."
"Hngk!"
Without hesitation, he pushed the tube in deep. A woman's urethra was much shorter than a man's—around 5cm at most. Though it varied, Heo Seong-ah's, being average, reached her bladder at about 6cm.
"Hngk..!"
There was no sense of it hitting bottom. Yellow piss simply leaked out along the inserted tube. Pushing farther risked injuring the bladder, so the Manager noted her depth and selected appropriate tools. Meanwhile, urine dribbled carelessly from the tube's end onto the floor.
Splatter─
"Hnngh..."
The sensation of waste draining from her body, coupled with the humiliating sound echoing in her ears, was excruciating. Heo Seong-ah bit her lip hard in resentment as her piss emptied against her will. He couldn't see her face... but she was surely squeezing her eyes shut in shame.
"B62, let me say this upfront: urethra training isn't as tough as anal training."
"Yes..."
"You have exactly three tasks in this session."
"W-what are they...?"
"First, condition yourself to spray piss pathetically every time you cum. Second, heighten your sensitivity so you orgasm whenever you need to pee. And third, train your bladder to hold until your owner permits release."
"Yes...?"
Both sounded simple enough on paper. Spraying piss during climax was just like her squirting now, wasn't it? And anyone could hold their pee until allowed. Not grasping the true purpose of urethral modification, Heo Seong-ah responded indifferently, holding her tongue.
"Then let's begin."
"Yes, Manager..."
As the real modification kicked off... Heo Seong-ah berated herself for her complacency and began thrashing wildly.
"Kkhiiiik!!"
"Stay still. Should I bind even your fingers and toes?"
"Kkuuuh..!"
He connected a syringe full of aphrodisiac to the empty tube and pressed the plunger—and just the slight swelling of her bladder from that alone had her bucking like mad. The modification hadn't even started yet. This was mere preprocessing.
"Kkuuuuh!!"
The syringe held 100ml; just one dose so far. Considering an adult woman's average bladder capacity... 300ml should be no problem.
"Kkh..!"
As soon as he removed the syringe, aphrodisiac trickled out along the tube. The Manager pinched the end shut with his finger and attached another prepped syringe, pressing the plunger.
"Ghk... aaaaaah..!!"
The leaking drug reversed course up the tube. The pain of her bladder expanding... was beyond what any normal woman could endure.
"Kkuuuaaaang..!"
Pain? It wasn't even pain, really—just the ordinary urge to pee. The issue was she couldn't force it out no matter how hard she tried, and the terror of her bladder swelling to burst gnawed at her nerves.
"Kkhk... ugh..! Nooooo!!"
The Manager attached the final third syringe and pressed. The pressure was stronger, but 300ml went in easily enough.
"Kkhaaaah..."
With the injection complete, he pinched the tube's end tight. Perhaps she'd never held this much before—her smooth lower belly now bulged prominently with the outline of her swollen bladder, asserting its presence.