Chapter 65: The Price of the First Decision

Silence settled over the underground chamber.

Not the ordinary silence that followed a battle, nor the brief stillness that came when danger temporarily retreated.

This silence felt deliberate.

As though the entire chamber had stopped breathing to listen.

Kael stared at the sentence written across the open pages of First User’s book.

THE FIRST DECISION WAS NEVER MEANT TO BE REVERSED.

The words remained perfectly still.

No flickering letters. No distortion. No attempt to rewrite themselves.

For once, whatever force governed the strange records beneath Aetheris seemed content to let a sentence speak for itself.

Kael slowly lowered his quill.

"You’re going to have to explain that."

First User closed the book.

"I already have."

"No. You’ve given me another cryptic warning and expected me to understand it. That’s not an explanation."

A faint expression crossed the silver-eyed man’s face.

"You’re still remarkably impatient."

"And you’re still remarkably skilled at avoiding questions."

Behind Kael, Leon shifted his stance. His golden mana remained faintly visible around his hand, ready to form a blade at the slightest sign of danger.

Elena stood beside Mira, one hand resting near her weapon. Her eyes moved between First User and the Observer.

Pi remained close to Kael’s shoulder.

Unlike the others, however, the little creature wasn’t watching First User.

It was staring at the closed book.

Its golden eye narrowed.

"Pi..."

First User noticed.

For the first time since appearing, his expression changed.

"You shouldn’t have spoken."

Pi’s small body stiffened.

Kael immediately stepped forward.

"Don’t speak to it as though it did something wrong."

First User looked at him.

"Do you understand what it remembered?"

"Not completely."

"Then perhaps you should consider the possibility that ignorance is protecting you."

Kael gave him a cold look.

"Everyone keeps telling me that. The woman, the stranger, the Observer, and now you. Apparently, the entire world has agreed that I’m better off not knowing anything."

"Some things are difficult to remember without repeating them."

"And some things are difficult to fix when everyone refuses to explain what happened."

First User said nothing.

Kael continued.

"Pi remembered the agreement. It remembered why the six witnesses accepted the ending. It remembered that the decision wasn’t supposed to destroy everything, but to preserve something beyond it."

His gaze sharpened.

"So tell me. What exactly did you sacrifice?"

The Observer moved slightly.

"Kael."

It was a warning.

Kael ignored it.

First User opened his book again.

A silver line appeared across the page.

Then another.

They connected into the outline of a circle containing seven small marks.

Six were illuminated.

The seventh remained dark.

"The first decision required more than an agreement," First User said. "It required something to be surrendered."

"What?"

"Continuity."

Kael frowned.

"Explain."

"The world that existed before the first ending could not continue in its original form. It had reached a point where its foundations could no longer sustain it. The laws governing its existence had begun to contradict themselves. Memories, identities, possibilities, and even the distinction between past and future were becoming unstable."

Mira’s expression tightened.

"You’re describing a complete collapse of reality."

"Not precisely," First User replied. "A collapse would have been simpler. What happened was worse. The world was beginning to lose the ability to distinguish between what had happened, what could happen, and what had never existed."

Leon looked at the circle.

"And the witnesses?"

"They accepted that the world could not be preserved as it was."

Elena’s eyes narrowed.

"Then what did they preserve?"

First User’s gaze shifted towards Pi.

"The possibility of something remaining."

Pi lowered its head.

Kael felt a familiar pressure beneath his collarbone.

The silver cracks beneath his skin stirred.

He looked at First User.

"You’re saying the world had to end so something else could begin."

"That is one way to understand it."

"And the sacrifices?"

First User turned a page.

The circle disappeared.

In its place appeared seven empty outlines.

"Every beginning carries something forward. But the first decision was different. The witnesses understood that whatever remained could not simply inherit everything from the world that came before."

His voice became quieter.

"Some memories had to be surrendered. Some connections had to be severed. Some identities could no longer exist in the same form."

Mira stared at the book.

"You’re saying the people who agreed to the decision lost something about themselves?"

"More than something."

The six illuminated marks gradually faded.

"For the world to continue, the witnesses surrendered their claim to the previous world. They accepted that the things they remembered, the people they had known, and the lives they had lived could no longer be used to hold reality together."

Leon looked troubled.

"Then why does Pi remember?"

First User didn’t answer immediately.

Instead, he looked at the small creature.

"Because the seventh never accepted the same condition."

Pi’s tail curled around Kael’s shoulder.

"Not forget."

Two words.

Barely audible

Yet they carried enough weight to make the silver lines in First User’s book tremble.

First User closed his eyes briefly.

"Yes. You refused."

Kael looked down at Pi.

The creature that usually spent its time biting his fingers, demanding attention, and sleeping wherever it pleased had remained behind when the others departed.

Not because it had been forgotten.

Because it had chosen to remember.

Kael slowly looked back at First User.

"Then what did you surrender?"

For a moment, the underground chamber seemed to grow colder.

First User’s fingers tightened around the book.

"That is not something you need to know yet."

Kael’s expression darkened.

"You’re doing it again."

"Because you still haven’t understood the consequences."

"Then help me understand them."

First User’s silver eyes met his.

"If the first decision is reversed, the things that were surrendered will not simply return."

The silver quill in Kael’s hand grew colder.

"They will be demanded."

A faint vibration travelled through the floor.

Mira immediately turned towards the broken pillars.

"Something’s happening."

The Observer raised one hand.

"Everyone, step back."

The chamber’s walls shuddered.

A thin black line appeared across the far side of the room.

It wasn’t a crack in the stone.

It was a crack in the space itself.

Kael recognized the sensation.

It was similar to the distortions that had appeared in Room Seven, but this time there was something else mixed into it.

A familiar presence.

Something that had been waiting.

First User looked towards the crack.

His expression became grim.

"Already?"

The Observer’s crimson eyes narrowed.

"You knew this would happen."

"I knew it might."

"Then why did you come here?"

First User didn’t respond.

The crack widened.

A pale light seeped through it, revealing a corridor that didn’t belong beneath Aetheris.

Kael recognized the architecture.

White walls.

A floor without visible seams.

And at the far end—

A door.

The same black door he had encountered in his memories.

The same door that had repeatedly demanded the name he had chosen before entering this world.

Kael took a step forward.

First User immediately raised his hand.

"Don’t."

Kael stopped.

"What’s behind it?"

"Something that should have remained closed."

"That’s not an answer."

"No," First User said. "It’s a warning."

The door at the end of the corridor trembled.

A sound travelled through the chamber.

Three knocks.

Then silence.

A fourth knock followed.

Pi suddenly raised its head.

Its golden eye widened.

"Home..."

Kael looked at it.

"Is that where you stayed?"

Pi didn’t answer.

Instead, it slowly crawled down from his shoulder and placed its feet on the stone floor.

Its gaze remained fixed on the corridor.

For a moment, Kael thought it was going to move towards the door.

But Pi stopped.

Its tiny wings trembled.

"Not... home."

The creature looked back at Kael.

"Before."

Kael’s expression changed.

The corridor was connected to something older than the academy.

Older than the worldline’s current structure.

Possibly older than the agreement itself.

And Pi remembered it.

"Pi," Kael said carefully. "What is behind that door?"

The creature lowered its head.

"Lost."

A sudden pulse of mana swept through the chamber.

Leon raised his hand.

"Kael!"

The corridor’s walls bent inward.

Something appeared behind the door.

A shadow.

Then a hand pressed against the other side.

The black door began opening.

First User immediately turned towards Kael.

"Listen carefully. Whatever happens, do not use your Authority on that door."

Kael’s eyes narrowed.

"Why?"

"Because it isn’t an outcome."

The door opened another fraction.

"It’s a connection."

Kael understood.

His Return Authority could reject a predetermined outcome that had already occurred.

But the door wasn’t an event that had happened.

It was a passage linking two states of existence.

Using his Authority against it might create a contradiction far worse than the one they were trying to prevent.

He tightened his grip on the quill.

"Then I’ll cut the connection."

First User’s expression changed.

"That is precisely what you must not do."

Kael stared at him.

"Why?"

"Because you won’t be cutting the connection between the two worlds."

The door opened.

A familiar voice emerged from the other side.

"You’re late."

Kael’s breathing briefly stopped.

It was the same voice he had heard in Room Seven.

The stranger.

The one who had remained after the first decision.

The one who had asked Pi to wait.

A figure stood beyond the doorway.

He looked almost exactly like Kael.

The same face.

The same general features.

But his expression was different.

There was no confusion in his eyes, no uncertainty, no attempt to understand the situation.

He looked like someone who had already accepted what was coming.

His wrist bore the silver mark.

The broken chain.

The unfinished circle.

He glanced at Pi.

"You remembered."

Pi moved towards him.

"Pi!"

The stranger crouched and extended his hand.

For a brief moment, the little creature seemed ready to leap into his arms.

Then it stopped.

Its eyes shifted towards Kael.

The stranger noticed.

A faint smile appeared on his face.

"That’s good."

Kael stepped forward.

"Who are you?"

The stranger looked at him.

"You’ve asked me that before."

"And you never answered."

"Because you weren’t ready for the answer."

Kael’s patience finally snapped.

"Enough. I’m tired of everyone deciding what I’m allowed to know."

The stranger’s expression softened.

"I know."

"No, you don’t."

"I remember what you were like before you learned to hide your fear behind questions."

Kael’s fingers tightened around the quill.

The stranger glanced at First User.

"And you brought him here."

First User remained silent.

"Interesting," the stranger continued. "I thought you were trying to keep this place closed."

"I was."

"Then why?"

"Because the Witness remembered."

The stranger looked at Pi.

Something passed between them.

Not surprise.

Not confusion.

Recognition.

"You finally remembered what we asked you to keep."

Pi lowered its head.

"Keep..."

The stranger nodded.

"Yes."

Kael stepped between them.

"Stop speaking as though I’m not here."

The stranger’s attention returned to him.

"Then ask the right question."

Kael’s expression remained cold.

"Fine. What did the six witnesses sacrifice?"

The stranger’s smile disappeared.

Behind him, the corridor changed.

The white walls became transparent.

Beyond them stretched a vast, dark expanse filled with distant fragments.

Kael saw pieces of places.

A ruined city.

A field of white flowers.

A tower suspended in a sky without stars.

And countless figures standing motionless between them.

Some looked familiar.

Others were impossible to distinguish.

The stranger spoke.

"They sacrificed the right to return."

Kael’s eyes narrowed.

"Return where?"

"To what they had been."

Silence.

The stranger continued.

"When the first decision was carried out, the witnesses accepted that the previous world could no longer be restored without repeating the collapse. They surrendered their claim to it. They would not reclaim their old lives, their old identities, or the world they had lost."

Mira stared through the transparent corridor.

"Then what happened to them?"

"Some became part of the boundary. Some were chained to possibilities that could no longer be allowed to exist. One was erased. And one..."

His gaze moved to Pi.

"One remained."

Pi’s small body trembled.

Kael slowly turned towards First User.

"Is this what you meant?"

First User’s expression was unreadable.

"Part of it.

"Then tell me the rest."

The stranger answered before First User could.

"The first decision wasn’t simply about allowing the world to end. It was about preventing the ending from taking everything with it."

He looked directly at Kael.

"And you carried it out."

Kael felt the silver mark on his palm grow warm.

The familiar pressure beneath his skin intensified.

"Why me?"

The stranger didn’t answer immediately.

Instead, he looked towards the Observer.

"You’ve been watching him for a long time."

The Observer remained still.

"Long enough to know that he shouldn’t have returned."

Kael glanced at the masked figure.

"Shouldn’t have returned?"

The stranger nodded.

"You were never supposed to come back as you are now."

A cold sensation travelled down Kael’s spine.

"Then what was I supposed to return as?"

The stranger looked at him with an expression that was difficult to interpret.

"Nothing."

The word echoed through the chamber.

"Your existence was meant to end with the first decision. Not because you were unwanted, but because the role you carried out required you to remain outside what came afterward."

Kael stared at him.

"You’re saying I was supposed to disappear?"

"Yes."

Leon stepped forward.

"Then who brought him back?"

The stranger looked at Leon.

"That is a different question."

"No," Kael replied. "It’s the same question."

He turned towards First User.

"You said the System was only a tool. You said someone else gave me the reason to return. And now he’s telling me I wasn’t supposed to return at all."

Kael lifted his palm.

The silver mark glimmered.

"Who decided that I should come back?"

First User’s eyes darkened.

"That decision wasn’t mine."

"Then whose was it?"

The stranger looked towards the black door.

For the first time, uncertainty appeared in his expression.

"Someone who believed the first decision had left too much unfinished."

The corridor shuddered.

A distant bell rang.

Not the seventh bell.

Something deeper.

Something that seemed to come from beneath the world itself.

The stranger immediately stood.

"That’s enough."

First User looked at him.

"You knew this would happen."

"I knew it might."

"Then you should have told him."

The stranger shook his head.

"If I had, he would have come here sooner."

Kael raised his quill.

"You’re all going to explain yourselves. One way or another."

The stranger regarded him for a long moment.

Then he said something that made Kael’s hand go still.

"You asked me to make sure you could carry out the first decision. I did."

His eyes moved towards Pi.

"I asked the Witness to wait. It did."

Then he looked back at Kael.

"But I never promised that you would survive what came afterward."

A heavy silence followed.

Kael felt the silver cracks beneath his skin pulse painfully.

He had known that the stranger was connected to the first decision.

He had known the man had remained after the others left.

But hearing those words made the situation feel different.

The stranger hadn’t merely watched the decision happen.

He had helped make it possible.

And whatever happened afterward, he had been unable to prevent it.

The Observer suddenly stepped forward.

"Close the door."

The stranger turned.

"Not yet."

"Close it."

"There’s something he needs to see."

First User immediately opened his book.

"Don’t."

The stranger ignored him.

Beyond the corridor, the fragments of the ruined world began moving.

One by one, they turned towards Kael.

The field of white flowers.

The ruined city.

The tower.

And finally, a place that made his heart tighten.

A room.

A simple room with a desk, a black book, and a clock frozen at seven minutes past midnight.

Room Seven.

But this version was different.

The walls were damaged.

The window was shattered.

And someone sat in the chair behind the desk.

A woman with dark hair and tired eyes.

She slowly raised her head.

Even through the distance, Kael recognized her.

The woman who had told him that he made the first decision.

The woman who claimed he had asked her to forget him.

Her eyes met his.

Then she spoke.

"You’re finally here."

Kael took a step forward.

The stranger immediately caught his arm.

"Don’t answer her."

The woman stood.

Behind her, another figure appeared.

A person wearing a familiar white mask.

The Fifth.

But unlike the chained figure Kael had encountered before, this one stood freely.

Its mask was unbroken.

Its white eyes were filled with grief.

It looked directly at Kael.

And then, in a voice that sounded almost like his own, it spoke.

"You weren’t supposed to bring them back."

Kael froze.

The woman turned towards the masked figure.

"That’s not what he promised."

The Fifth tilted its head.

"Then why did he leave?"

The corridor began collapsing.

First User’s book flashed with silver light.

A new sentence appeared across its pages.

THE FIRST DECISION HAS BEEN RECOGNIZED.

Another line formed beneath it.

THE SACRIFICE HAS BEEN REMEMBERED.

Then a third.

THE CLAIMANTS ARE RETURNING.

The stranger released Kael’s arm.

His expression had become dangerously serious.

"Now you understand."

Kael looked at the words.

"Understand what?"

The stranger stared towards the collapsing corridor.

"Why the first decision was never meant to be reversed."

The distant figures began moving.

And for the first time, Kael noticed something disturbing.

They weren’t approaching the door.

They were approaching the people inside the chamber.

The stranger turned towards him.

"Because the things we sacrificed weren’t merely memories or identities."

His voice lowered.

"They were the ones who were supposed to remain dead."

The underground chamber shook violently.

The silver circle in the distance split into seven pieces.

And somewhere beyond the collapsing corridor, a voice spoke.

Not the Observer.

Not First User.

Not the woman.

It was a voice Kael recognized.

His own.

"Then let us see whether the world is worth what we gave up."

The black door slammed shut.

And every light beneath Aetheris went out.