The 10,000cc Challenge
A girl I became friends with on the street.
She is taken to a hotel, where she can’t leave until 10,000cc of air is inside her stomach.
■ 10,000cc – The Case of Mahiru Nanase
〇Name: Mahiru Nanase
〇Age: XX years old
〇Occupation: Vocational school student (Fashion course)
〇Hobbies: Cosplay, taking selfies, streaming on social media (has a secret/private account)
At a certain cosplay event, I spotted a girl wearing a school swimsuit beneath a thin coat.
I asked if I could take a few photos, and she agreed.
When I told her there was a nearby photo studio, she followed me with a cheerful smile, without a hint of hesitation.
An hour later, in a hotel room.
I had her lie on the bed, still in her swimsuit, and inserted a tube into her rear.
Then, I began pumping air into her.
At first, she resisted, made noise. But after the 4000cc mark, she fell silent.
5000cc…6000cc…
Her belly started bulging unnaturally, pressing hard against the fabric of her swimsuit from the inside.
Perhaps unable to bear the pressure, she gasped, unhooked her shoulder straps, and pulled the top half down.
Her sweaty skin was now exposed, and the swollen belly dominated the room with its disturbing presence.
7000cc…8000cc…
“Please… it hurts…” she whispered, again and again in a hoarse voice.
Tears welled in her eyes, her face twisted in pain, and her body trembled.
Her social media has not been updated since that day.
Today’s event was school swimsuits.
A man with an expensive-looking camera told me he had access to a private studio, so I followed him.
Then he inserted a tube into my rear, and my belly started to swell.
I screamed for help, as loud as I could—
But somewhere along the way, my voice stopped coming out.
The tighter my swimsuit felt, the harder it became to breathe.
I tried to pull the swimsuit down, hoping it might help,
But it didn’t change anything.
My belly just kept getting bigger.
It flt like I was going to burst. I was terrified. It hurt.
Tears rolled down my cheeks on their own.
“I’m sorry… I can’t… please, stop…”
I begged in a hoarse, cracking voice.
But he didn’t stop.
All I wanted… was to do a photoshoot.
Why… why did it turn out like this?
■10,000cc – The Case of Ichika Hoshino
Name: Ichika Hoshino
Age: XX years old
Occupation: Third-year university student (Faculty of Literature)
Hobbies: Visiting cafés, writing poetry, watching videos of small animals
I spotted her at a café near the university—a girl with a soft, gentle presence.
When our eyes met, she reacted faintly but smiled without any sign of suspicion.
I struck up a conversation, and we hit it off.
When I told her, “I know a quiet place nearby,” she nodded without hesitation.
An hour later, in a hotel room.
I had her undress and sit on the bed.
A dry sound echoed as I began pumping air into her belly through the tube I’d inserted into her rear.
After passing 4000cc, her expression stiffened.
She lowered her gaze and, in a trembling whisper, asked, “…Is this really okay…?”
I gently reassured her with vague, comforting words.
She gave a small nod and quietly held her posture.
She might still have been able to escape at that point.
5000cc…6000cc…
Her face twisted in pain as she cried out, “Please stop.”
She tried to get away, but it was already too late.
I pinned her down on the bed, holding her tightly from behind.
Her shallow breaths, “huh… huh…,” brushed against my ear.
Her lungs weren’t inflating properly—she couldn’t breathe.
Her body trembled like she was convulsing,
And her sobbing devolved into unintelligible, choking cries.
7000cc…8000cc…
Her eyes wide open, she screamed, her pleading for life echoing through the room.
As her body convulsed, a creaking noise—mishi… mishi…—filled the space.
She tried to press down on her abdomen as if to resist,
But it was meaningless.
After that day, the girl was reported missing.
I was supposed to study at the café.
He just happened to talk to me, and I thought—he seemed kind.
I’ve always had trouble saying “no,” and when he said it would be “just for a little bit,” I nodded without thinking.
Before I knew it, my clothes were off, and I was sitting on a bed.
He pushed some strange device into my rear, and there was a weird sound.
By the time I realized what was happening, my stomach already hurt.
But… I still believed him.
He said, “It’s okay,” so gently.
I thought it would be okay.
But it wasn’t.
Something inside my belly started moving.
It tightened, made strange noises.
I couldn’t breathe right.
I screamed, “Stop… please!”
But he wouldn’t stop.
When I tried to run, he pushed me down.
I wanted to cry out, but only strange noises came out—”hyu… hyu…”
The air just wouldn’t come in.
My chest felt like it was being squeezed tight. I couldn’t breathe at all.
From inside my belly, I heard it—creak… creak…
My skin felt like it was stretching, burning, like it was about to tear.
It was so painful, like I was being scalded.
I didn’t even want to touch it—
But still, I placed my hands over my belly.
I tried to hold it down. I just wanted it to stop.
I couldn’t breathe anymore.
My lungs wouldn’t move.
It was getting darker.
I was scared. It hurt.
Please… someone… anyone…
I only wanted to go to the café.
Why… why did it turn out like this?
■ 10,000cc – The Case of Runa Kiritani
〇 Name: Runa Kiritani
〇 Age: XX years old
〇 Occupation: Part-time worker (maid café staff)
〇 Hobbies: Posting dance videos, collecting Korean cosmetics, trying out new convenience store sweets
In a quiet back alley with little foot traffic,
she danced lightly to music, her phone propped up against a wall.
Her blonde half-twin tails bounced with each step, and her full chest moved with the rhythm of her body.
I waited until she finished, then approached.
“I’m looking for a model for a dance video,” I said.
She followed, slightly excited.
An hour later, in a hotel room.
I had her take off her tank top, sit on the bed, and began pumping air into her.
At first, she laughed, thinking it was some kind of joke.
But her face soon turned serious.
5000cc…6000cc…
The internal pressure in her belly spiked, and her breathing grew shallow.
She desperately bounced her ample chest, trying to draw air into her lungs.
Unable to bear the discomfort, she kept shifting her posture again and again,
but no position brought relief.
Sweat clung to her skin, and the fabric of her shorts stuck to her thighs.
Her dancer-trained legs trembled uncontrollably.
7000cc…8000cc…
Her swelling belly pressed upward, crushing her chest, warping its shape.
In a voice so small it was hard to believe she was the same girl dancing earlier,
she kept whispering, “I want to go home… please… let me go…”
Occasionally, a creaking sound—mishi…—came from her belly as the skin strained.
Even as her body trembled, using what strength she had left,
she continued begging, over and over again.
Since that day, her dance videos have not been updated.
A light step.
Then a turn. Moving with the rhythm…
Yeah, I’m dancing pretty well.
That’s when someone called out to me—
Said he was “looking for a dance model.”
From the way he looked at me, I could tell he was after my body.
But I was broke, and I figured I could play along and make a little money, so I followed him.
Now… my belly is swelling. Bigger and bigger.
He took off my clothes, stuck a tube in me—
Honestly, I laughed at first.
I thought it was some weird joke project or something.
But—
My stomach… it just kept swelling.
It started to hurt. I couldn’t laugh anymore.
I couldn’t breathe.
I was trying so hard, gasping, my chest rising and falling,
But no matter how much I breathed, it wasn’t enough.
There’s so much air inside me… but none in my lungs.
I tried changing positions.
It still hurt. Still suffocating.
There was nowhere to escape.
I was sweating nonstop.
“I want to go home… please… let me go…”
I begged. Over and over.
But he wouldn’t stop.
My thoughts started going fuzzy.
I couldn’t even understand what I was saying anymore.
When I looked down, all I could see was my bloated belly.
I couldn’t even see my feet.
It felt like my stomach was going to tear open.
I was scared. So scared.
I just…
I was just dancing…
Just filming a fun little video, like always…
Why… why did it turn out like this?
■ 10,000cc – The Case of Shizuku Ogata
〇 Name: Shizuku Ogata
〇Age: XX years old
〇 Occupation: Junior college student (Early Childhood Education)
〇 Hobbies: Collecting picture books, making candles, taking nap
Near the station, in the break area of a public library.
She was dozing off at the far end, a pale-skinned girl.
Her white blouse had slipped slightly from her shoulder, exposing her collarbone and soft-looking skin.
With her small frame and the vulnerable expression of a sleeping infant, she looked defenseless.
In her arms were a textbook on early childhood education and a folded picture book.
Her open planner rested on her lap—there were no scheduled plans written in it.
There was no reason to hesitate.
An hour later, in a hotel room.
I stripped off her clothes and laid her on the bed, face-up.
Her arms were crossed above her head, restrained in a raised position.
As soon as I began pumping air, she woke up, and the bed started to creak.
She thrashed and gasped, but by the time we passed 3000cc, her movements slowed.
Her swollen torso robbed her of control over her body.
4000cc. 5000cc…
“…uuh… ghhh…!”
Her breathing turned erratic, and her chest began to rise and fall.
Tears streamed down her face as she shook her head—the only part she could still move—side to side.
Her pale skin stretched tightly, and sweat formed on her forehead.
6000cc. 7000cc…
From that small body, an unnaturally distended belly protruded.
Her skin stretched as if on the verge of splitting, and blood vessels rose like cracks beneath the surface.
“Nn… no… please…”
Her trembling lips moved again and again.
The sounds that came out were barely recognizable as a voice—just faint vibrations.
8000cc. 9000cc…
Her body arched back, unable to withstand the pressure.
“…nn… nn…”
No voice came anymore.
Only thin, short breaths escaped from deep in her throat.
Her small body had already surpassed its limit.
Beneath the thin, over-stretched skin, her organs writhed.
Even if the air were released now, there would be no returning to normal life.
Whether she understood that, I don’t know.
But her eyes stared at a single point on the ceiling, unmoving.
The tears that had trailed down her cheeks had stopped at some point.
She hasn’t been seen at her junior college since that day.
The pages that’ll be on tomorrow’s quiz.
I carefully copy them into my notebook, marking them with a highlighter.
I want to work with children someday.
Becoming a preschool teacher, surrounded by laughter—that’s my dream.
When I was little and caught a cold,
there was this one gentle childcare worker who took care of me.
I always thought, “I want to be like her.”
Warm sunlight poured in.
My favorite picture book sat on my lap.
The warmth wrapped around me… before I knew it, my eyelids were falling…
………………
When I opened my eyes, I saw an unfamiliar ceiling.
My clothes were gone, and my arms were bound above my head.
“What… is this…?”
A shhhh— sound echoed from the tube inserted into my rear.
I knew immediately. It was air. And a lot of it.
As I inhaled, my stomach clenched tight.
That feeling alone told me something was terribly wrong.
It was swelling. My belly was inflating.
My diaphragm was pushed up from behind my stomach—my lungs couldn’t expand.
It was hard to breathe. I couldn’t get air in.
Pain pulsed through my lower abdomen.
My uterus felt like it was being forced out of place.
My intestines were being stretched, twisted, expanding somewhere deep inside.
“…uuh… ghhh…”
A deep, heavy pain.
And then, a noise—like wet fabric tearing—echoed from inside my belly.
It hurt so much at first… but now I couldn’t even feel it anymore.
But my belly just kept growing, endlessly.
“No… no… please…”
My stomach felt like it was going to burst.
Nausea surged, but I couldn’t throw up.
My esophagus was blocked.
I arched my back, struggling to send what little oxygen I could to my brain.
“…nn… nn…”
Something inside me was crushing me from within.
I could feel it.
There’s no going back.
Even if they stopped and let the air out now…
It’s all… all of it… breaking down from the inside.
I couldn’t see.
Air slipped out through my gaping mouth.
The pain and panic faded, and my mind quietly began to slip away.
Why…?
I tried so hard.
The picture books… the training… my dream…
Why… why did it turn out like this?
