A thousand years ago—
No one wrote what truly happened.
Not because it was meant to be hidden.
But because those who witnessed it… did not remain.
There were six.
They came together for a reason no one remembers now.
And in a single night—
Something was sealed.
Not destroyed.
Not erased.
Hidden.
In a place far beyond human reach.
Time passed.
Years turned into centuries.
And slowly…
Everything was forgotten.
Except for one thing.
A flaw.
A mistake that was never corrected.
Because among the six—
Not all of them chose the same path.
And now—
After a thousand years—
Something had begun to move again.
Yun knew nothing about any of this.
To him, it was just another night.
Or at least… it should have been.
The alley was quieter than usual.
Too quiet.
Yun walked at a steady pace, his school bag resting against his shoulder. His expression was calm, as always—distant, but not cold.
People often misunderstood that about him.
They thought he didn't care.
But the truth was—
He simply preferred to think before reacting.
At school, Yun wasn't the type to stand out.
He didn't talk much.
Didn't get involved in unnecessary things.
He focused.
Especially on one subject.
Chemistry.
There was something about it that made sense to him.
Every reaction had a reason.
Every change followed rules.
Unlike people.
"…It's quieter than usual," he murmured.
He slowed down.
Something felt off.
He stopped.
Then looked up.
The sky stretched above him, dark and endless.
Stars scattered across it.
But one of them—
Caught his attention immediately.
It wasn't brighter than the others.
But it pulsed.
Slowly.
Steadily.
Yun frowned slightly.
"…That wasn't there before."
He was certain.
He noticed details.
Patterns.
Changes.
That was how his mind worked.
The star pulsed again.
Then—
It disappeared.
Yun blinked.
"…What?"
Before he could process it—
A sound echoed behind him.
Sharp.
Sudden.
Something had fallen.
He turned quickly.
There, on the ground—
A faint glow.
Yun approached carefully, his movements controlled.
When he got closer, he crouched slightly.
"…Unknown material."
It wasn't metal.
Not glass.
It emitted light.
But no heat.
That alone didn't make sense.
He reached out.
Hesitated for a moment.
Then touched it.
A pulse.
Yun's breath caught.
The sensation didn't come from the object.
It came from inside him.
From his chest.
"…Strange."
For a brief moment, his calm expression shifted.
Then he steadied himself.
"Stay logical."
He picked it up and slipped it into his pocket.
By the time he reached home, everything looked normal again.
Too normal.
His room was exactly as he left it.
Clean.
Organized.
Books stacked neatly.
Notes arranged carefully.
A small chemistry set sat on his desk.
Yun placed his bag down and took the object out again.
It still glowed.
He sat at his desk.
For nearly an hour, he observed it.
He tested its surface.
Measured its weight.
Watched its light.
No change.
"…It doesn't follow any known properties."
That conclusion unsettled him more than he expected.
Still—
He wrote everything down.
That was how he dealt with uncertainty.
He studied it.
Eventually, exhaustion caught up to him.
He placed the object beside his bed.
And lay down.
Sleep came slowly.
Midnight.
Yun opened his eyes.
He couldn't move.
"…Sleep paralysis?"
His mind remained clear.
Then—
He felt it.
Something moving.
Inside his chest.
His breathing slowed instinctively.
Not panic.
Observation.
"…No… that's not possible."
His eyes shifted slightly.
The object—
Was gone.
"…Where did it—"
The sensation grew stronger.
A slow movement.
Deliberate.
As if something was searching.
For a place.
For something specific.
Yun tried to control his breathing.
Tried to stay calm.
But his heart—
Began to race.
"…Stop."
No response.
The movement reached deeper.
Closer to his heart—
Then—
Everything stopped.
Yun sat up suddenly.
Gasping.
His hand pressed against his chest.
"…It's inside."
He didn't need proof.
He knew.
And for the first time—
He didn't have an explanation.
Morning came.
School felt distant.
Yun sat in his usual seat, notebook open, pen ready.
From the outside—
Nothing had changed.
"Yun."
Creighton dropped into the seat beside him.
Tall.
Lean.
With slightly messy dark hair and sharp, observant eyes.
He wasn't loud.
But he noticed things others didn't.
"You look worse than usual," Creighton said.
"I didn't sleep well."
Creighton smirked slightly.
"You say that every time something's wrong."
Yun didn't reply.
That alone was enough.
The lesson began.
Chemistry.
Yun focused immediately.
Then—
A sound.
A sharp crack.
From the lab.
Then—
A spark.
Then—
Explosion.
Glass shattered.
Students screamed.
Smoke spread rapidly.
Chaos.
"Everyone out!" the teacher shouted.
Students rushed toward the exit.
But Yun didn't move immediately.
He observed.
Flame color.
Orange.
Reaction type—
Unstable mixture.
Someone had made a mistake.
The fire spread.
Then—
He saw it.
A student on the ground.
Not moving.
Too close to the flames.
Yun stood.
"Yun!" Creighton called.
But Yun was already moving.
Fast.
Precise.
He grabbed a cloth.
Covered his mouth.
Entered the smoke.
Heat hit instantly.
He ignored it.
His mind worked.
Airflow.
Reaction spread.
He reached the student.
Pulled him back.
But the fire expanded again.
Too fast.
"…No."
Then—
A pulse.
Stronger than before.
His vision blurred—
For a fraction of a second.
Then—
Clarity.
He saw it.
The pattern.
How the reaction moved.
Where it would spread.
Where it could be stopped.
"…There."
He grabbed a fire extinguisher.
But instead of panic—
He acted with precision.
Short bursts.
Targeted.
Interrupting the reaction chain.
Cutting the oxygen flow exactly where needed.
Within seconds—
The flames weakened.
Then—
They went out.
Silence.
Heavy breathing.
Smoke.
And shock.
Everyone stared.
Including Creighton.
"…You saw something," he said quietly.
Yun didn't answer.
Because he felt it.
Inside his chest.
A steady pulse.
Alive.
And somewhere far beyond his understanding—
Something had begun.