Nakime's body crumbled into ash.
The Infinity Castle began to collapse—
And Xia Feng was returned to the Butterfly Estate.
With Nakime's death—
Only two Upper Moons remained.
Inside the main courtyard—
Kokushibo stood alone, his blade raised.
With a single sword—
He held back four Hashira.
Meanwhile—
Muzan Kibutsuji stood before Kagaya Ubuyashiki, a cold smile on his face.
This man—
The leader of the Demon Slayer Corps.
The one who had hunted him for a thousand years.
"You've finally come… Muzan Kibutsuji," Kagaya said gently.
His tone was calm—
As if speaking to a stranger.
Even though countless Demon Slayers had died because of Muzan—
There was no hatred in his eyes.
Only pity.
Muzan looked at him indifferently.
"You must hate the Ubuyashiki family deeply," Kagaya continued. "That's why… you came personally to kill me."
Nearby—
Mitsuri Kanroji, Obanai Iguro, Tengen Uzui, and Muichiro Tokito were all being held back.
Kokushibo blocked them effortlessly.
The more anxious they became—
The more openings they revealed.
In moments—
They were already wounded.
Muzan spoke coldly, "So this is your headquarters. If I destroy it… will there be anyone left to kill Demons?"
Kagaya shook his head with a faint smile.
"No. We are different from you."
"All Demons exist because of you. If you die, they will all disappear."
"But the Demon Slayer Corps…"
"Even if destroyed—"
"Will rise again."
His faith in his swordsmen—
Especially the younger generation—
Was unwavering.
Muzan narrowed his eyes.
"Then I'll kill them all."
"Every single one."
"I'll make Demon Slayers hide like rats—never daring to step into the light again."
He stepped forward slowly.
Kagaya drew a Nichirin Blade.
Though weak—
Though unable to match even a normal Demon Slayer—
His resolve burned just as fiercely.
"I may not be strong… but my will to kill you is the same as theirs."
Muzan sneered.
His nails extended into sharp claws.
"Then I'll turn you into a Demon."
"Become what you hate most."
In an instant—
He appeared before Kagaya.
Blinding speed.
"Master!!"
Tengen Uzui roared.
He unleashed his full strength.
"Sound Breathing, Fifth Form—String Performance!!"
His attack struck toward Kokushibo—
But Kokushibo calmly raised his blade.
"Moon Breathing—Piercing Moonlit Petals!"
He blocked it effortlessly.
Even as Uzui was wounded—
His focus remained on Muzan.
Because—
He had already thrown something.
A bomb.
It landed near Muzan.
BOOM!!
An explosion erupted—
Mixed with a special compound designed to harm Demons.
Smoke engulfed Muzan completely.
Uzui retreated, clutching his wound.
Kokushibo's attack had nearly killed him.
At the same time—
The other Hashira moved.
They knew—
Protecting Kagaya came first.
Even if it cost their lives.
They were prepared to die.
From within the smoke—
A hand shot out.
Sharp claws—
Pierced into Kagaya's body.
Muzan stepped forward, smiling.
"You're a Demon now."
"I wonder… will you kill yourself?"
Kagaya collapsed.
His wife, Amane, rushed forward and held him.
Her expression trembled.
His body—
Was changing.
Veins bulged across his skin.
His eyes turned pale.
His teeth sharpened.
She covered her mouth.
She knew what this meant.
Her husband—
The leader of the Demon Slayer Corps—
Had become a Demon.
Muzan laughed.
"The Demon you all seek to kill… is now your master."
"So—"
"Will you strike?"
He threw Kagaya's body toward the Hashira.
Kokushibo stood calmly, watching.
Kagaya clutched his throat.
His expression twisted—
Feral.
Bloodthirsty.
Yet—
He forced out words.
"Tengen Uzui… kill me."
Uzui froze.
He couldn't.
This man—
Was their leader.
Their core.
"I… can't!!"
He turned his head away.
For a moment—
Clarity returned to Kagaya's eyes.
He smiled faintly.
"You are the strongest swordsmen… I've always believed in you."
"You will kill Muzan."
"But before that…"
"Grant me a death without shame."
Obanai Iguro stepped forward slowly.
His expression dark.
Uzui immediately blocked him.
"Have you lost your mind?! That's our master!"
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