They did not stop until their lungs burned.
Not until the pressure in the air lessened.
Not until even the faint sensation of being watched had dulled from unbearable to merely suffocating.
Only then did Kurose raise his hand.
"Here."
The group entered the ruins without question.
It looked like the remains of some ancient outpost buried within the lower Abyss—broken walls of black stone, collapsed pillars, fragments of architecture too unnatural to belong to any civilization they knew.
The ceiling above had long since shattered.
Darkness poured through the cracks like liquid.
Yet for now—
It was shelter.
Fushimi collapsed the moment they set him down.
A strained gasp escaped him as he clutched his ribs.
Kanzaki knelt beside him immediately.
"…Three broken. Maybe four."
Fushimi forced a weak laugh.
"…Could've been worse."
"No," Kurose said flatly.
"It couldn't have."
Silence followed.
No one argued.
Because everyone understood what he meant.
If Ryuzen had intended to kill—
Fushimi would be dead.
Yuna sat against a broken wall, still clutching her throat from where Ryuzen had nearly taken her.
Her hands would not stop shaking.
Not from fear.
From confusion.
Because she had seen it.
That moment.
That hesitation.
That pain in his eyes when he tried to say his own name.
Kanzaki finished binding Fushimi's chest and sat back slowly.
Her expression remained composed—
But only barely.
"…We need to discuss what happened."
Kurose remained standing near the ruined entrance.
Watching the dark.
"Nothing to discuss."
"There is," Kanzaki replied immediately.
Her voice sharpened.
"It recognized itself."
"No."
Kurose's answer came without hesitation.
"It reacted to stimulus."
Yuna's head snapped up.
"That wasn't just stimulus!"
Everyone turned toward her.
Her voice trembled—
But not from fear this time.
"He remembered!"
Kurose looked at her coldly.
"No. It repeated a sound tied to mental trauma."
"That's not true!"
"It is the only conclusion that keeps you alive."
Silence slammed down.
Yuna stood abruptly.
"He looked at me!"
Her voice cracked.
"He reacted when I said his name—he tried to speak—he remembered who he was!"
Kurose stepped toward her.
"And what if you're wrong?"
She froze.
His gaze did not soften.
"What if what you saw was not memory—
but mimicry?"
Her breath caught.
Kurose continued.
"What if that thing is only learning how humans respond to attachment?"
No one spoke.
Because the possibility was horrifying.
Kanzaki adjusted her glasses slowly.
"…There is another possibility."
All eyes shifted to her.
She hesitated.
Then said:
"…The human memories may still exist."
Hope flickered in Yuna's eyes.
But Kanzaki's next words killed half of it.
"…As corrupted residual data."
Silence.
"What does that mean?" Fushimi asked quietly.
Kanzaki looked toward the darkness.
"It means the assimilation may not have erased him completely."
Pause.
"It may have overwritten him incompletely."
Yuna's voice dropped.
"…So he can be saved?"
Kanzaki did not answer immediately.
Because honesty mattered more than comfort.
"…I don't know."
Another silence.
Then—
Kurose spoke.
"Whether he can or not is irrelevant."
Yuna turned sharply.
"No it isn't—"
"Yes."
His voice cut through her instantly.
"Our mission is survival."
He stepped closer.
"Do not let sentiment cloud your judgment."
Her fists clenched.
"That's our friend!"
"No."
His answer was immediate.
Sharp.
Cold.
"That was your friend."
The words hit harder than any blow.
Yuna stared at him.
Breathing uneven.
Eyes wet.
Then she turned away.
No one stopped her.
No one knew how.
Time passed.
No one rested.
No one truly could.
Fushimi drifted in and out of consciousness against the wall.
Kanzaki kept scanning the perimeter with improvised sensor fragments from her damaged gear.
Kurose remained near the entrance.
Watching.
Always watching.
And Yuna—
Sat alone near the far side of the ruins.
Silent.
Thinking.
Remembering.
She remembered the campfire.
The rain.
Ryuzen sitting apart from everyone else.
Acting annoyed when she brought him food.
But eating it anyway.
She remembered him quietly helping others when no one noticed.
She remembered the way he looked at the world—
Like he expected disappointment from it.
But still chose to protect people.
That thing in the Abyss—
That monster—
Had looked at her.
And for one second—
She knew.
She knew he had been there.
Somewhere.
Buried.
Suffering.
Her jaw tightened.
Decision formed.
And before she could lose the courage—
She stood.
Kanzaki noticed first.
"…Yuna?"
No answer.
Kurose turned.
His expression darkened instantly.
"…Sit down."
She kept walking.
"Yuna."
Still walking.
His voice sharpened.
"Stop."
She turned.
Eyes trembling.
"…If there's even a chance he's still in there…"
Her voice broke.
"…I can't leave him like that."
Kurose moved instantly.
Too late.
She ran into the dark.
"DAMN IT—"
She found him exactly where she knew he would be.
Standing beneath a broken arch of black stone.
Motionless.
As if he had been waiting.
Ryuzen.
His back faced her.
He did not turn.
Did not move.
Did not attack.
Yuna's breathing trembled.
"…Ryuzen…"
No response.
She stepped closer.
Careful.
Slow.
"…It's me."
Silence.
Another step.
Her voice softened.
"…You remember me, don't you?"
Still nothing.
Tears gathered in her eyes.
"You used to hate when people bothered you during lunch…"
A twitch.
She saw it.
Her breath caught.
"…You always pretended not to care…"
Another twitch.
"But you still helped everyone when they needed you…"
His shoulders shifted.
Barely.
"…You stayed awake all night when I got sick during the trip…"
His fingers twitched.
"…You gave me your jacket and told everyone it was annoying listening to me complain…"
A sound escaped him.
Small.
Broken.
"…Yu…"
She froze.
Hope exploded inside her.
"Yes—yes—"
She stepped closer.
"That's right—"
His body trembled violently.
The Abyss groaned.
Stone cracked beneath their feet.
"…Yu…na…"
He turned.
And for one impossible second—
His eyes were human.
Clear.
Shaking.
Lost.
Tears filled hers instantly.
"You remember—"
Then—
Everything broke.
Ryuzen screamed.
A sound like a dying machine and a human soul tearing apart at once.
BLACK STATIC exploded from his body.
The ground split open.
The walls warped.
Reality bent around him.
"RU—"
He vanished.
Then reappeared directly in front of her.
Eyes wild.
Body twitching uncontrollably.
One hand around his own throat.
The other reaching toward hers—
Not attacking.
Not intentionally.
But unable to stop.
"YUNA!"
Kurose crashed into her from the side.
They hit the ground hard.
A blast of distorted force erupted where she had stood.
Stone vaporized.
Fushimi and Kanzaki arrived seconds later.
Ryuzen staggered in place.
Screaming.
Blood—gray and black—poured from his nose and mouth.
His own body was tearing itself apart.
Kanzaki's voice shook.
"…Memory overload—he's destabilizing—"
Ryuzen's gaze found Yuna.
And in that broken face—
She saw agony.
Pure agony.
His lips moved.
"…Run…"
Everyone froze.
Then—
The Abyss exploded.
Kurose grabbed Yuna violently.
"MOVE!"
They ran.
Again.
Behind them—
The entire chamber collapsed under waves of distortion.
Stone shattered.
Black fire spread.
The Abyss screamed with him.
No one looked back.
Not until the noise faded.
Not until distance swallowed the destruction.
Only then did they stop.
Yuna collapsed to her knees.
Sobbing.
Kurose stood over her.
Breathing heavily.
Face pale.
"…Now do you understand?"
She couldn't answer.
Couldn't speak.
Couldn't deny it anymore.
Because he had remembered her.
And it had destroyed him.
Kanzaki stared into the dark.
Her voice barely audible.
"…The human inside him still exists…"
Pause.
"…But trying to reach it may kill everyone around him."
Silence.
Heavy.
Final.
Far behind them—
In the ruins of shattered stone—
Ryuzen knelt alone.
Bleeding.
Trembling.
Hands clutching his head.
Fragments of memory burning through his mind.
Rain.
Fire.
Laughter.
Pain.
A girl crying.
A name.
His name.
He whispered it into the dark—
As if afraid to forget again.
"…Ry…uzen…"
And somewhere beneath the static—
Something human wept.
[ END OF CHAPTER 5 ]