Nagano Prefecture — Abandoned Reservoir
Night had completely fallen.
The sky was pitch black.
Only a few broken streetlights flickered weakly in the wind.
The abandoned reservoir looked like a silent graveyard.
Sitting casually on a massive rock—
Mahito played with several distorted human souls.
The tiny shapes twisted helplessly in his hands.
Like toys.
"Still not here?"
Mahito complained impatiently.
"That Mechamaru guy."
"If he keeps us waiting…"
"…maybe I'll just kill all the humans nearby to pass the time."
Standing beside him—
The man wearing Suguru Geto's body remained calm.
In truth—
The ancient sorcerer Kenjaku.
He held a sealed cursed object in one hand.
"Be patient."
Kenjaku spoke calmly.
"He has no choice."
"He'll come for his body."
Suddenly—
RUMBLE.
The ground began shaking violently.
The surface of the reservoir exploded.
Water erupted into the air.
From beneath the water—
A gigantic shadow rose.
A massive mechanical puppet.
Dozens of meters tall.
Covered in reinforced armor plates.
Thrusters burning on its back.
Ultimate Mechamaru — Absolute Form.
The culmination of seventeen years of accumulated cursed energy.
Mahito whistled.
"Well well."
"A giant robot."
"This looks fun."
Inside the enormous mech—
Kokichi Muta gripped the control handles tightly.
His expression was tense.
Behind him—
Someone sat casually with crossed legs.
Eating popcorn.
Yagami Sora.
"So this is your mech?"
Sora said while chewing.
"Not bad."
"Feels like something out of Gundam."
"Not quite Evangelion level…"
"But impressive for the jujutsu world."
"Stop joking."
Muta said nervously.
"That's Mahito."
"A Special Grade cursed spirit."
"Relax."
Sora tossed another piece of popcorn into his mouth.
"I'm here."
"You just perform."
"I'll handle the rest."
"…Understood."
Muta activated the mech's external speakers.
His voice thundered across the valley.
"Mahito!"
"I'm here!"
"Keep your promise!"
Mahito jumped down from the rock.
Waving cheerfully.
"Hey!"
"You finally showed up!"
"I thought you were too scared."
"Enough talking!"
The mech raised its arm.
A massive cannon pointed directly at Mahito.
"Restore my body first!"
"That was the binding vow!"
Mahito laughed.
"Alright, alright."
He stepped closer.
But suddenly—
He stopped.
Something felt wrong.
Mahito's eyes narrowed.
His ability allowed him to perceive souls directly.
But inside the mech—
Muta's soul was…
Completely intact.
And his body…
It radiated life.
Healthy.
Stable.
Not damaged at all.
Mahito's smile froze.
"…What?"
"Your body…"
"…has already been healed?"
"Impossible."
Mahito frowned.
"Only Idle Transfiguration should be able to reshape a human body."
"So who—"
Kenjaku's expression darkened slightly.
He sensed something familiar.
And dangerous.
"No need to pretend anymore."
Muta sneered.
"Mahito."
"Your Idle Transfiguration might seem invincible."
"But this world still contains monsters you cannot understand."
"For example…"
The mech's chest opened.
A figure jumped out.
Landing lightly on the ground.
Black hair.
Red eyes.
Jujutsu High uniform.
Yagami Sora.
He brushed popcorn crumbs from his hands.
Then smiled brightly.
"Surprised?"
"Mr. Stitched Face."
"And…"
"Mr. Brain."
Mahito and Kenjaku both stepped back instinctively.
"Yagami Sora?!"
They had not expected this variable.
Not here.
Not tonight.
"What?"
Sora tilted his head.
"Not happy to see me?"
"I came all this way just to bring you something."
His smile widened.
"Warmth."
"The kind that sends you…"
"…straight to hell."
"Damn it!"
Mahito roared.
His body instantly morphed into dozens of blade-like appendages.
They shot toward Sora at terrifying speed.
"I'll kill you here!"
Sora didn't move.
"Reflection."
CLANG.
CLANG.
CLANG.
Every blade bounced away the moment it touched the invisible vector field.
Mahito's expression twisted in disbelief.
"Now!"
Sora shouted.
"Mechamaru!"
"Roger!"
Inside the cockpit—
Muta slammed the control lever forward.
"Seventeen years…"
"Of accumulated cursed energy!"
"Simple Domain — Deploy!"
Four massive devices launched from the mech.
They slammed into the ground around Mahito.
A cylindrical barrier formed instantly.
Within the barrier—
Mahito's cursed technique was disrupted.
A Simple Domain.
A technique designed specifically to counter abilities like Idle Transfiguration.
Mahito's eyes widened.
"What—?!"
"My technique—!"
Muta's finger hovered above the firing switch.
His voice trembled with emotion.
"Goodbye, Mahito."
He pressed the button.
"Ultimate Mechamaru — Great Exorcism Cannon!"
BOOOOM.
A blinding beam of cursed energy erupted from the mech's chest.
The entire reservoir valley lit up.
Mahito's figure disappeared inside the explosion.
The night sky trembled under the force of the blast.
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