There are ghosts in this world.
Ghosts hide among people.
Anyone who learns this will be assimilated, except those with markings.
Jujutsu sorcerers must not harm people.
Kunikuni Kazuya
Cursed Technique: Human-Type Specialization
In exchange for giving up all damage against nonhuman creatures, it grants absolute dominance over humanoid targets.
0.
Kunikuni Kazuya is destined to eradicate all demons alongside Kunikuni Yoriichi.
The year Kazuya was born, the Kunikuni family was wiped out, and demons took the place of humans.
1.
Kunikuni Kazuya lives among demons.
Only one white cat cares about him.
It is his cat.
2.
When he finds the trail of the first Lower Moon, Kazuya sees a boy.
The boy has white hair and brows, blue eyes, and a distant gaze.
He looks like his cat.
3.
On his way to slay the first Upper Moon, Kunikuni Kazuya sees that boy again.
The boy's temple is bleeding, his clothes are in tatters, his expression defiant, and the purple sphere at his fingertips is the only bright spot.
It is his cat.
4.
Kunikuni Kazuya's world contains only three things: his cat, Yoriichi, and killing demons.
Now he has to think of a way to bring his runaway cat home.
Gojo Satoru grows up hearing stories about Kunikuni Kazuya.
"A congenital weakling." "Pathetic cripple."
"Insane! He even attacked his own family!"
"Everyone should help eliminate him." "A disgrace to the jujutsu world!"
"Don't try to get close to him!"
"He'll be the greatest enemy you'll face as you grow up!"
"Whatever you do, don't let him see you!"
Oh, wouldn't that make things more interesting? Gojo Satoru thinks idly.
Tokyo Jujutsu High, outside the Tombs of the Star.
Toji and Gojo are facing off, Toji's finger on the trigger.
"Gojo, I'm a year older than you, so I suppose that makes me your senior." Kunikuni Kazuya leisurely reaches out and rests a hand on Gojo Satoru's shoulder.
His palm is blocked by Limitless. Pale, with a wrist so slender it looks like it could snap with a twist.
Gojo Satoru, who reached the pinnacle of jujutsu sorcery as soon as he mastered the Reverse Cursed Technique, scoffs.
The next second, Toji, gun in hand, is frozen in place far away, and tears stream down Riko's face.
The bullet drops. Kazuya casually rests a hand on Gojo's shoulder.
"A senior's first piece of advice: Never underestimate anyone."
The higher-ups.
Gojo and Geto are being interrogated one after another.
"These old fossils are so annoying, yammering on and on," Gojo Satoru frowns, anger ready to boil over.
Tap, tap. Slow, dragging footsteps approach.
The roof is torn off, sunlight pours in, and the gloomy atmosphere vanishes in an instant.
The human-shaped figure seated behind the folding screen twists unnaturally, its corpse crumbling into sand.
A pale, lean hand settles on Gojo Satoru's shoulder, its lips purple and fingertips flushed red.
Kazuya leans down, his breath brushing against Gojo's ear.
"A senior's second piece of advice: When you want to strike, don't hold back."
"Hey, hey, senpai, tell me your third piece of advice~"
Gojo Satoru's voice softens, but his movements are forceful.
Kunikuni Kazuya is pinned against the wall as the other man slowly brings his palm close, his fingers slipping between Kazuya's.
Kazuya smiles, his Adam's apple bobbing.
"A senior's third piece of advice: If you want to confess, just say it."
Kazuya's three-step strategy for winning over a cat: Make it see me, make it notice me, make it surrender.
Reader's notes:
-Kazuya is a little unhinged.
-A childhood friend appears from out of nowhere, and the cat has always been Gojo.
-[Can't kill Fly Heads, but can instantly kill Sukuna]
This is an advantage built into the setting: Human-Type Specialization.
Please don't read if this bothers you.
-This story has many original settings and is not set in the Jujutsu Kaisen world alone.
-Yoriichi what-if, Demon Slayer Corps in a modern setting.
-The Demon Slayer Corps are curse users, and Geto will be a curse user too.
Because: "Jujutsu sorcerers must not harm people."
-Kazuya is Yoriichi's younger brother, eight years younger, and a brother-con.
-To be decided
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