Riser
patreon
18-285
🕑 Added 2025-09-06 20:13:27 +0000 UTCEP.185 Shoving in the Urethral Plug (2)
Now that the depth of the urethra had been determined, the only thing left was to shove it in.
"I'm putting it in now."
There was no need to announce it, but he said it so she'd steel herself.
Clenching her teeth, Heo Seong-ah felt the cold glycerin slowly press in through the rubber nozzle.
"Ah... aaahhh!"
A deeply unpleasant sensation, as if urine were flowing backward inside her...
Heo Seong-ah, already at her limit from the start, felt the pain of her bladder swelling.
"Aaah! Wait a second!!"
Bending her waist, she begged, but Jun-ha's hand kept pressing the plunger.
"Kkeuuuah... M-Master... It feels like my bladder's going to burst..."
"Already?"
"Y-yes!"
Her forehead pressed to the ground, trembling all over and drenched in cold sweat it didn't seem like she was lying.
Stopping his hand, Jun-ha checked the syringe markings.
Only 50ml of glycerin had been injected so far; counting the remaining amount in the nozzle, barely 45ml at most.
"If you can't even handle this much and thrash around in pain, what will you do, Seong-ah? This isn't even a quarter of it."
"Huh...? Ugh... Master, it really feels like my bladder's about to burst..."
Sobbing with pain, Heo Seong-ah hesitantly pressed her hand to her lower abdomen.
Sure enough, there was a round, balloon-like bulge she could feel inside.
"Master... hic... it really hurts..."
"I know. I know... Hmm, that's odd."
He had read online that an adult woman's bladder can hold about 500ml.
Supposedly, if you hold it until you're nearly bursting, it can even stretch to 1L.
Maybe because women's urethras are shorter than men's, the urge to urinate feels much more intense?
"Seong-ah, have you never held your pee before?"
"Huh?"
Why was he suddenly asking that?
Utterly baffled, Heo Seong-ah recalled the kind of childhood trauma everyone has.
"Once in middle school, I missed the rest stop on the highway, so I had to hold it for a while... In class, I also held it for about an hour when I missed break time..."
"No, not that. I mean, have you ever truly held it to your absolute limit and peed?"
"Huh? ...No..."
If you don't even know your own limits, how could you possibly answer? It was a misguided question from the start. Chewing on her lip, Heo Seong-ah mumbled her reply.
"Hmmm..."
Jun-ha sighed inwardly, then quietly pressed the plunger again.
Even if not 500ml, he figured 300ml should fit, since that's about the average female bladder capacity.
"Kk!? Aaagh! Master!!"
"Bear it. It won't burst from this, don't worry."
"Kkeuuuuk... aaah..!"
"And you only get to pee twice a day, remember? You'll need to hold it a lot in the future, so let's expand your bladder now, okay?"
"Don't do that... kkeuk... please!"
"I'll make sure you can."
The excretory organs are very flexible compared to other organs.
Even forced expansion like this shouldn't cause permanent damage.
"Aaaaagh!"
"Done."
Somehow, all 300ml of glycerin was forced into her bladder without incident.
Including the urine she was already holding, that made about 400ml.
On her smooth lower belly, the shape of her bladder now stood out clearly.
"Don't move yet, or you'll get hurt."
"Kkuuk... kk!?"
Coating the urethral plug with gel, Jun-ha shoved it in without hesitation.
"Aaaaaaah!!"
"Don't exaggerate. It's not that painful, right? It's about as thick as the rubber nozzle."
"Au... kk..!"
Fear of not being able to release her overfilled bladder, and the bizarre sensation in her urethra, scared her more than the pain.
Because it was short and thin, the plug started slipping out every time she tensed her body.
If this kept up, it wouldn't serve its purpose as a plug...
"Kkehaak!!"
The moment Jun-ha twisted the base of the plug clockwise, a wave of pain flattened Heo Seong-ah onto the floor.
"Aaaah!!"
Pressing her sensitive, swollen bladder against the ground, she quickly rolled over onto her back.
"Does that hurt?"
"It hurts... hic..."
There was a locking mechanism inside the plug.
Turning the base clockwise made the tip fan out like a blooming flower.
Jun-ha thought the small, rigid silicone wouldn't hurt much, but that was his mistaken assumption from never experiencing it himself.
"Kkeuuk... uh..."
For the one suffering, there couldn't be a worse torture.
She wanted to pee, but no matter how hard she strained, nothing would come out.
Instead, her bladder contracted painfully, making it even worse.
She'd lost her human right to excrete freely.
Now, if she wanted to pee, she'd have to beg her Master so humiliating she wanted to die.
"Hic... kk..."
And there was still another ordeal waiting.
Jun-ha tugged on the urethral plug to check it wouldn't come out.
"Looks good."
"Ugh..."
After checking repeatedly, Jun-ha dipped the syringe into the glycerin barrel and filled it again.
"Seong-ah, now get down and spread your ass."
"Hic..."
Flinch.
Heo Seong-ah, her anus twitching, clutched her cheeks and curled up.
"M-Master... hic... I'm sorry..."
This was... just too much.
It was already agony to have just her bladder full, but to have her rectum filled as well she'd never sleep a wink all night.
"Sigh, Seong-ah. Are you asking for a beating again?"
"N-no!! I-I just... please have mercy, Master... hic..."
"Hmm..."
Flattening herself in a naked dogeza, Heo Seong-ah pleaded in earnest.
Her bladder felt like it would burst, but she endured it in hopes of forgiveness.
"Well, there's no need to do both at once."
"R-right...? So then..."
"No, but I still want to do it."
"Hic!!"
A female livestock has no choices.
If the Master says it will be done, it will be done.
"Turn over, stick your ass up, and spread it, Seong-ah."
"Hic..."
The first rebellion could be overlooked, but not a second time.
Unable to make further excuses, Heo Seong-ah turned away, got on all fours, and spread her ass wide herself.
"Hic..."
"Why are you so scared? Haven't you pooped and peed before? This is just an enema you just have to hold it in."
Forcing both her intestines and bladder to capacity and making her hold it in...
It was absurd to compare it to normal excretion.
"If you can't even stand this, you really are useless. And you know what happens to useless livestock, right?"
"Au... I'll bear it..! I can do it..!"
"That's how you should have acted from the start."
Female livestock who are abandoned are turned into amputee onaholes.
Wasted away in a corner, only dragged out when their Master wants to use them a toy with no human rights.
She never wanted that end.
"Seong-ah, see this? It might be tough."
The anal plug Jun-ha showed was three silicone balls, slightly smaller than ping-pong balls, strung together.
There was a small hole in the base for connecting a rubber nozzle; she could imagine what it would be used for.
"Let's see... You said you've had some training. Shall I check your condition?"
"Ugh... ah... haak..!"
Jun-ha, without warning, shoved his finger deep into her anus.
Beyond her clenched sphincter, sticky fluid coated his finger like lubricant.
"Kk... kkhik... ha... aaang..!!"
He bent his finger up and down, stimulating the front wall of her rectum, then pushed deeper to tap an internal bulge.
Every time he touched an artificial nodule, Heo Seong-ah's body twitched.
"Puh, this is fun."
"Hic... uh... aung... ha..."
Heo Seong-ah tried to repress the shameful pleasure her body felt from anal stimulation, biting her lip to swallow her moans.
She didn't realize such reactions only fueled his sadism.
After a while, Jun-ha wordlessly pulled his finger out.
"Kkhik!"
Her anal lining turned inside out for a moment, as if begging for something to be inserted.
"Young is definitely better, Seong-ah."
With an anus so elastic, it would soon be ravaged by cruel tools.
Jun-ha, already excited, was looking forward to customizing her to his tastes.
He wanted to ruin her instantly, but decided training would progress slowly for now, this was just punishment time.
"It might hurt, but bear it."
"Kkkhaaaak!!"
A 3cm-wide silicone ball forced open her anus as it entered.
Her sphincter was so strong that even a relatively small anal plug wouldn't go in easily.
"Kkeuuuuuuk!!"
One of the balls slowly made it fully inside.
With just a third inserted, the pressure in her ass nearly took her breath away.
"Alright, here's another."
"Huu... uhh..."
With a quick motion, Jun-ha pretended to push the anal plug in deeper, then yanked it out hard.
Pop
"Kyaaaaaaaaaaaaa!!"
Her asshole gaped wide, the inner lining turning out like a rose.
