In this world, one rule exists:
You may do anything you want—except break your personal taboo.
No one knows what your taboo is.
Until you break it.
Chapter 1 — Everyone Has One
Ren Aoyama hated normal days.
Normal days pretended people were good.
At 9:12 a.m., Ren was half-asleep in class when the bell rang.
It didn't stop.
Instead, the sound stretched—metallic, distorted—until it felt like it was drilling into his skull.
Then the classroom windows turned black.
Not dark.
Black.
Like paint poured over reality.
A message appeared on the board.
WELCOME TO TABOO CITY
ALL PARTICIPANTS HAVE ONE RULE.
Ren's heart tightened.
He already knew.
DO NOT BREAK YOUR TABOO.
A girl screamed.
The floor cracked.
She vanished—then reappeared kneeling in the center of the room, shaking.
Above her head:
TABOO: DO NOT LIE
A voice echoed.
"Answer honestly."
She opened her mouth.
And lied.
Her body folded in on itself like crushed paper.
She died without blood.
Silence swallowed the room.
Ren finally understood.
This world didn't punish actions.
It punished who you were.
Chapter 2 — The Rule That Hunts You
Panic came later.
At first, people experimented.
Someone stole a phone—nothing happened.
Someone punched another student—nothing happened.
Then a boy whispered a lie to himself.
He died screaming.
Ren observed.
Taboos weren't moral.
They were personal.
The things you never cross.
A girl with short black hair sat beside him.
"I'm Mira," she said. "Don't talk too much."
Ren nodded.
"What's yours?" he asked.
Mira smiled faintly.
"If I tell you, I might die."
Screens lit up across the city.
FIRST PURGE AT SUNSET
BREAK SOMEONE ELSE'S TABOO
Ren clenched his fists.
"So we're weapons now," he muttered.
Mira shook her head.
"No. We're traps."
Chapter 3 — When Silence Is a Crime
Screaming echoed through the dorm halls that night.
A boy died not because he spoke.
But because he stayed silent.
That was the moment Ren realized the truth.
This world doesn't reward bravery.
It rewards compatibility.
And his taboo—
The one rule he could never break—
Was exactly what Taboo City would demand next.
The countdown began.
23:59:59
End of Chapter 3
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