Extra: Sukuna.
In this world, negative human emotions generate cursed energy and spawn curses—spiritual entities capable of inflicting real-world harm and death.
And in turn, sorcerers—users of cursed energy—arose to combat them.
This is a world steeped in malice.
It is also the origin of Ryomen Sukuna.
---
When consciousness returned to his body, Sukuna stood staring at the bisected corpse of Gojo Satoru.
...
A deeply complex expression twisted his face.
Not joy at killing a powerful foe.
Not melancholy over the fall of one who challenged him.
But...
Profound, unbearable disappointment with reality.
Why...
Why have I returned to this boring world!?
Why am I not dead!?
What kind of joke is this!?
Was it all just a dream…?
Some low-tier author's idiotic plot twist!?
No…
Sukuna stopped looking at Gojo's corpse and turned his gaze inward—to his mental landscape.
There it was: the crimson gate.
Its aura was unmistakable.
Countless times in his sleepless nights, Sukuna had seen this door upon snapping out of a trance.
The power within—it defied imagination.
His face twisted into a savage grin.
Unable to hold back, Sukuna threw his head back and howled in delight. His body shook like a child given the gift they'd begged for.
It wasn't a dream!
Everything I experienced… it all truly happened!!
Kagami...
Uchiha Kagami!!
My curse on you… has only just begun!!
---
"What's so funny? Killing Gojo made you that happy?"
Boom!!
Lightning roared.
It was Kashimo Hajime, the strongest jujutsu sorcerer of four hundred years ago. His life's obsession: to battle the strongest.
Without hesitation, he unleashed his ultimate form—usable only once in a lifetime—Mythical Beast: Amber.
His body was cloaked in a storm of cursed energy, thunder bursting outward.
As the lightning beast descended from the heavens, Sukuna ceased laughing, his gaze filled with irritation.
It was the look of someone interrupted mid-meal by a buzzing fly.
"Compared to the ones I've fought…"
"…Forget it. Not worth comparing."
Sukuna raised a single finger and flicked—
BOOM!!
A crimson-black slash, crackling with lightning, devoured Kashimo's entire attack—
Then erased him completely.
...
The observers from Jujutsu High were struck dumb.
They expected Kashimo to lose.
But not to die so easily, in an instant.
After the silence:
"H-how… how is this possible?"
"What was that power? It looked like a fusion of Black Flash and some kind of slash!"
"If Sukuna had this, why didn't he use it against Gojo?!"
"Was he… holding back!?"
...
Sukuna placed a fingertip to the earth. His awareness expanded infinitely.
He could sense it now—
The self that had returned… was as powerful as he was in his final battle against Uchiha Kagami.
He also understood why.
The All-Power Kagami discarded… had chosen him.
"…Ah. You're just like me, aren't you?"
"Full of hate for the man who abandoned us…"
Sukuna muttered, unable to contain his elation.
"I'll catch up to him."
"I swear upon our pact—by offering up all the cursed energy in this world, I'll follow you across time itself."
"And then… I'll devour him completely."
"I accept you fully. Become a part of me."
The crimson gate shimmered like it understood. It unraveled into blood-red threads, fluttering like butterfly wings.
Those threads wrapped around Sukuna's body, forming symbols as red as blood.
Even his overflowing aura now warped space and time.
This world…
Could no longer contain his existence.
Sukuna looked to the stars, the four eyes on his face gleaming with a shade of gray-black.
The Void.
It was the boundary separating this dimension from the main universe—
A veil that shielded reality from fantasy.
Time had no meaning there.
Those who passed through it might emerge eons apart in the main world.
...
A black-and-red butterfly drifted beside Sukuna. So intricate that not even he could see its true form.
It was his soul.
His essence.
His origin.
It sang in low whispers, guiding him forward.
And Sukuna understood:
He was but a single drop from an ocean of divine consciousness—
a fragment born of some unfathomable will.
But it didn't matter.
Whose pawn he was, whose hand moved him—none of that mattered.
Uchiha Kagami.
I only want to kill you.
No matter what form you take, no matter what world you hide in—
even if you change your name or your face, I'll follow your soul's scent.
Even if I die a thousand times, I'll find you.
I don't need reasons. I don't need meaning.
I love you.
And I curse you forever.
Binding you to me is why I was born.
...
Boom!!
The space before Sukuna shattered.
From within emerged Uraume, panicked and gasping.
But she stopped, stunned.
This Sukuna felt… different.
More ruthless than he was a thousand years ago—
and yet, somehow… gentler?
It made no sense.
"Uraume," Sukuna smiled faintly. That smile… resembled someone else.
"I had a beautiful dream."
"I met someone—someone perfect. Unlike anyone I'd ever seen."
"He had every rotten trait of humanity. And yet, he was so beautiful in his madness, I couldn't help but fall."
"I wish I could tell you… who he really was."
"It's just…"
"…My vocabulary feels so inadequate. I want so badly for you to understand."
Uraume had never seen Sukuna like this.
Like a person bragging about the love of their life.
Sukuna-sama…
Where have you been?
What happened to you…?
He gently took her hand, and they ascended into the sky.
...
"Where are we going, Sukuna-sama?"
Without turning, his voice was soft:
"To find him."
"You're my most important chef."
"We're going to devour him—or be devoured by him."
"Either way… it'll be beautiful. And I want you to witness it."
...
"I understand, Sukuna-sama."
"I'll follow you anywhere."
What a burning, unshakable love…
Who could inspire such devotion in Sukuna?
...
"Don't you dare run, Sukuna!!"
Someone from Jujutsu High flew after him.
Sukuna didn't look back.
Slashes rained down like a storm from above—
obliterating the nation below.
The island vanished from the map.
Even the tectonic plate beneath was swallowed by a maelstrom.
Sukuna didn't even glance back.
Because the one who truly mattered…
was beyond the sky.
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