After passing through the barrier curtain, the group entered the interior of the Eishu Juvenile Detention Center.
But what greeted them was no longer a normal building.
The corridor ahead twisted unnaturally.
The walls looked as if they had melted like wax from a burning candle.
The floor warped upward and downward in grotesque angles.
The once-straight hallway now curved into spirals.
It felt less like a building—
And more like the interior of a living creature.
"W-What is this place?"
Yuji looked around in shock.
"We walked through the entrance… right?"
"So why does it feel like we've entered another world?"
"And those pipes… why are they moving?"
"It's a domain-like environment created by the cursed womb," Megumi said grimly.
Cold sweat dripped down his forehead.
"The Special Grade cursed womb has already begun evolving."
"Its cursed energy is rewriting the structure of the space around it."
"This isn't just an illusion."
"The internal space has actually been distorted."
Behind them—
Nobara turned around.
"The entrance is gone!"
Where the door had been moments earlier, there was now only a warped wall.
Distorted paintings hung across it like decorations in a nightmare.
A sense of panic began creeping into the air.
They were trapped.
Inside the belly of a Special Grade curse.
For first-year students with almost no field experience—
The pressure felt suffocating.
"Don't panic."
Yagami Sora's calm voice broke the tension.
Like an anchor stabilizing a ship during a storm.
The three of them instinctively relaxed slightly.
Sora stepped forward and placed a hand on the twisted wall.
The surface felt slick.
Almost organic.
Like touching the inside of a living creature.
He could even feel a faint pulse.
"The space hasn't disappeared," Sora said quietly.
"It's been folded."
Streams of data flashed across his vision as the system analysis function activated.
"The vectors of direction have been distorted."
"In this space… up, down, left, and right no longer behave normally."
"What appears to be a wall might actually be the floor."
"And what looks like a straight path might loop back on itself."
Nobara swallowed nervously.
"Then what do we do?"
"Which way do we go?"
"Follow me."
Sora turned and began walking deeper into the labyrinth.
"Even if the space is distorted…"
"The source of cursed energy cannot hide."
"That thing is basically a lighthouse in the dark."
"If we head toward the strongest cursed energy concentration…"
"We'll find it."
"Or more accurately…"
"We'll find the boss."
The three followed closely behind him.
Every step felt heavier than the last.
The deeper they traveled—
The more horrifying the scenery became.
Human corpses were scattered across the ground.
Some bodies were torn apart.
Others were half embedded into the walls as if swallowed by the structure itself.
These were victims who had entered the detention center before the sorcerers arrived.
"This is horrible…"
Yuji clenched his fists.
His nails dug into his palms.
"So this is what a Special Grade curse does?"
"Unforgivable."
"Stay calm, Itadori," Megumi said quickly.
"If you lose control of your emotions…"
"You'll make mistakes."
Then—
Sora suddenly stopped.
"What's wrong?" Nobara asked.
"We're here."
He pointed forward.
The corridor opened into a massive chamber.
The ceiling rose dozens of meters into darkness.
Like an underground cathedral.
In the center of the hall floated a massive sphere of flesh.
A grotesque cursed womb.
Its surface was dark purple and covered with pulsating veins.
The entire mass expanded and contracted rhythmically.
Like a giant beating heart.
THUMP.
THUMP.
THUMP.
Each pulse sent vibrations through the room.
The pressure alone made breathing difficult.
A terrifying presence radiated from the cocoon.
As if an ancient monster was about to awaken.
"T-This is…"
Nobara's legs began trembling.
"…a Special Grade cursed womb."
Instinctive fear flooded her body.
This was a level of existence that ordinary courage couldn't overcome.
Even Megumi was drenched in sweat.
His Divine Dog whimpered and crouched low, tail tucked tightly.
The difference in power was overwhelming.
Like a rabbit standing before a Tyrannosaurus.
"It's about to hatch."
Yagami Sora said calmly.
There was even a trace of anticipation in his voice.
The moment he finished speaking—
RIP.
The surface of the cursed womb split open.
Thick, amniotic fluid-like liquid spilled out.
From within emerged a pale, two-faced cursed spirit.
It hovered silently in mid-air.
Its body looked as though it had been stitched together from multiple creatures.
Strangely grotesque—
Yet eerily beautiful.
A true Special Grade cursed spirit.
In its hand—
It held a familiar object.
A shriveled, blackened finger.
One of Ryomen Sukuna's fingers.
"Heh…"
The curse grinned.
A sharp, mocking laugh echoed through the chamber.
Then—
BOOM.
Without warning, an overwhelming wave of cursed energy erupted from its body.
A shockwave blasted across the entire hall.
Yuji, Megumi, and Nobara had no time to react.
They were thrown backward and slammed into the walls.
"Cough—!"
Megumi spat blood as pain shot through his ribs.
Even his Divine Dog vanished from the impact.
The difference in power was absolute.
The curse hadn't even attacked.
Just releasing its cursed energy was enough to crush them.
So this…
Was the terror of a Special Grade.
But when the dust cleared—
One figure was still standing.
Yagami Sora.
He hadn't moved a single step.
Not even the hem of his coat fluttered.
The massive cursed-energy shockwave vanished within a meter of his body.
No—
It had been reflected.
A perfectly circular area surrounded him.
Inside the circle, the floor remained untouched.
Outside it—
The ground had been carved away completely, exposing steel reinforcement beneath the concrete.
Sora brushed imaginary dust from his sleeve.
Then he looked up at the Special Grade curse floating above.
A faint smile appeared on his face.
Cold.
Disdainful.
"Is that the greeting from a Special Grade?"
"…A little weak."