HAHAHAHHAHAHAHAHA, I was right, my theories were goddam right, of supernatural being coming to earth and introducing curse energy, though while i hinted Tengen may be one of them, probably was off the margin by introducing natural energy, oh well, I Was still right, Glaze me.
Ps, this is an extra chapter and a what if.
Chapter start here.
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Aaron's brow furrowed. He wanted to have some fun. While yes, spending time with the other MC was fun, he wanted something a bit more entertaining for himself.
"I get it," he said, clicking on Keitaro's file.
The file lit up. Aaron chose the strongest version of Keitaro — sage mode master, his cursed energy fully mastered, an open domain expansion and a closed domain that was stronger from the outside, the whole package.
He was sure the AI could handle it. His technology was still very advanced; he was from very far into the future, after all.
Good. Then he clicked on the "honor one" — the one who became a KitKat bar. Actually... forget it.
He chose the one that was Keitaro's best friend, since Keitaro himself had created a world where Geto's very racist and twisted ideology didn't make much sense. He didn't have to be evil. And while in the future, he did become friends with them again, that situation didn't happen here.
Okay, so this Gojo had complete control over his ability. His domain expansion was specially built to win domain battles; the outside of his domain was hardened, and if the need arose, he could in fact open a barrieless domain. He also had a new targeting system where he could put all his domain focus on one person — or one soul.
This Satoru would, in fact, beat the dog shit out of his canon self mid-diff.
That should tell you all you need to know about this slaughter fest.
Aaron wanted to make it fair though, so he decided to do something fun.
"Heian Era Sukuna, with the Ten Shadows and full knowledge of their ability." The computer listened to his words and began making the character. Good. This should make it a bit more fair. Without it, Sukuna would get absolutely raped — cheeks penetrated, more meat in there than the Kardashians have ever seen.
Maybe... he wondered what else to give him to make it more fair.
"Let's double his cursed energy pool. So now he has 4x what Yuta has."
So many buffs for Sukuna. Oh well. Hopefully this helped him win the fight.
"Now, simulate."
As those words left Aaron's mouth, the screen went black.
{Simulation start}
Keitaro opened his eyes. This place felt odd. He was just cuddling his son, teaching him to take his first steps, and Gojo was mid-teasing him when he was teleported here. Where the hell was he?
He teleported his blade into his hand. He currently carried some cursed tools with him — of course, his blade from his travels, alongside his precious gloves.
As he was going to analyze the scene, his friend appeared behind him.
"So that you need to go deep in that sh—" Satoru paused. Hold up. He was mid-conversation with Keitaro when the fuck did he appear here? Looking down, he saw Keitaro.
Oh, there was his friend. But before they could start, they felt an ominous presence. As they turned their heads around, they saw it: a figure with four arms radiating cursed energy like no other. He held two weapons — Kamutoke in one hand, and another trident-esque weapon in the other.
"Seems like my ingredients are here." The beast's voice was cold, and he seemed ready for this fight.
Keitaro's brow furrowed. He instantly entered sage mode, nature energy flooding his body like no other.
"Satoru..."
"On it," Gojo replied. The Mahoraga wheel above Sukuna's head told them everything they needed to know about this fella, and thus, without wasting a second, they both rushed at Sukuna.
"Dismantle." Thousands of slashes came at them. Gojo, as always, was confident in his ability and didn't even bother to dodge. The slashes just bounced off his Infinity. Keitaro was using Satoru as a shield to get closer.
Once within fifteen feet, he tossed twenty kunai all around the King of Curses.
'He can teleport to any of those... which one will it be?' Sukuna's mind ran fast trying to catch the real Keitaro. He turned his head as Keitaro appeared behind him, trying to attack.
Sukuna simply smiled.
"Predictable." Several slashes landed on Keitaro, slicing him into twenty pieces or so.
Sukuna had a shit-eating grin on his face. That was one dow—
BAM.
Sukuna was punched so damn hard in the face he felt the bones of his mask shatter into a dozen pieces as he was sent flying hundreds of meters away.
"Not done with you." Gojo used Blue to pull Sukuna in. The King of Curses immediately started using Domain Amplification in order not to get his shit worked.
Gojo formed a Blue in his hand before—
CRUNCH.
A piercing Rasengan was slammed into Sukuna's guts, causing the King of Curses' eyes to roll back into his head.
While the king was expecting an enhanced Blue punch, Keitaro had switched the Blue with his fully formed Mirage Rasengan. Don't ask questions. He could do that now.
Keitaro appeared behind Sukuna, a Blue in his hand...
Shit.
Gojo smiled, forming a Red before shooting it toward the king at full speed.
From the shadows, tongues emerged, pulling Sukuna out of the danger zone. Keitaro touched one of the tongues a millisecond before it pulled the beast away.
But this was planned. The Red slammed into the Blue... creating a hollow nuke.
Sukuna, currently in the shadow realm, turned his head to see a nuke.
...Well, fuck.
"Where do you think he is?" Gojo asked, looking at Keitaro.
KABOOM.
From nowhere, Sukuna was expelled from the shadow realm, bruised beyond belief.
"Well, he's over there," Keitaro said. Gojo nodded. Yeah, he could see that.
Sukuna healed his hand.
"Domain Expansion: Malevolent Shrine."
Sukuna's domain was an open-barrier domain, which meant it would attack everything. Keitaro knew Sukuna's range, so he could just teleport them outside of it, wait until Sukuna entered cursed energy burnout, and then attack him.
But before he could think of that, the arena shrank... oh, bullshit. This was just playing favorites.
Oh well.
"Domain Expansion: Mirage Labyrinth."
As those words left his lips, he opened his domain — the barrieless variation. As the two domains clashed, Sukuna realized something: he was losing the domain battle. Keitaro's domain was a non-lethal domain, which meant he had priority in a clash, and since their efficiency was roughly the same — with Keitaro's being slightly better — Sukuna's Malevolent Shrine now just looked like decoration inside Keitaro's domain.
Keitaro's brow furrowed as he watched the wheel spin.
Fuck. He guessed it would take three more spins for it to adapt. Oh well, time to apply pressure.
Keitaro teleported straight to Sukuna and began throwing hands. He blocked a punch to his gut, only for Sukuna to swing Kamutoke at him. As lightning struck where he had been a second ago, Keitaro had already teleported behind Sukuna. Cocking his fist back, he attempted to punch him with all he had — but the king was ready. Using two of his hands, Sukuna blocked Keitaro's punch.
Then he used his spear-like weapon to try and gut him like a fish. Keitaro teleported out of the way, and everything in the general area where he had been was reduced to ash.
That cursed tool was quite OP.
Taking out his Phantom Edge, Keitaro began clashing with Sukuna, subtly imbuing lightning into his blade to cut deeper into the king. Slashing with precision, not wasting a second.
As he went to attack Sukuna again, a tongue came from the ground and grabbed him, pulling him into the shadows. Inside, the Deer healed Sukuna, meaning he didn't waste any RCT to heal himself.
Goddamn fucker.
As Keitaro aimed to teleport away from Sukuna—since, you know, the fucker was a monster up close—from the shadow the Divine Dogs bit his leg. Using his sword, he slashed at them, but his eyes widened as he felt danger coming at him.
He attempted to teleport but realized the Divine Dogs were fused with the Deer, which meant... he couldn't use his curse technique. He was inside the zone where his technique was being nullified, which left him vulnerable to the Bull that had been running in Sukuna's shadow for a while. The Bull rammed into him.
Keitaro felt the full force of it. Even Gojo's Blue/Red-infused punch would pale in comparison to this.
Despite his reinforcement, he puked out blood. The edge of his domain cracked a bit. He was already healing his wounds with RCT, but damn that shit hurt like a motherfucker.
His ribs were reduced to ash—yet fully healed in seconds.
Sukuna's eyes seemed to realize something. While Keitaro was weak, he made a hand seal and, from the shadow, Maximum Elephant water came gushing out with a lot of force. Sukuna had once more fused the Deer with another Shikigami—this time the Elephant. The effect? The Elephant's water nullified curse energy.
And guess what's a good way to escape Keitaro's domain...
As thousands of seals were submerged—
CRACK.
The Labyrinth shattered.
Curse energy burnout hit him like a bitch. He didn't even have time to think before that bastard beat him like he owed her money or some shit.
Sukuna was about to launch an attack at Keitaro, but he forgot one thing.
Sometime before the clash:
"As soon as my domain is down, open yours. We get one chance to fry his brain," Keitaro had said, looking at Satoru.
"Don't get too beat up without me."
"Shut up, idiot."
"Minato being a tsundere."
"FUCK OFF."
"Oh, a bad word. I'll tell Shoko on you."
...
"Domain Expansion: Unlimited Void."
As those words escaped the Honored One's lips, Sukuna didn't hesitate—destroying his own brain in an instant, then rebuilding it like no other. Since his hands were already making the seal, he opened his mouth and said:
"Domain Expansion: Chimera Shadow Garden."
This was the perfected version of Megumi's domain. Inside this domain, the jumping of a lifetime could happen. From the shadows, twenty or so clones of Sukuna could be seen, alongside a lot of the other Shikigami in the Ten Shadows.
In order to perform this domain so quickly, Sukuna sacrificed the ability to open such an OP domain for a whole fucking year.
The tradeoff was brutal, but worth it.
Max Elephant used water, forcing Keitaro into the air. While there, Sukuna smiled, fusing Nue and the Bull to attack him midair. He knew Keitaro was still suffering from curse technique burnout, and he knew Keitaro wasn't going to destroy his brain to win.
He was planning on keeping that fresh if it was ever needed in the future—he was going to tire out the King of Curses.
While in the sky, Keitaro didn't care anymore. Cocking his fist back, he had a son to meet with when this was over.
BLACK FLASH.
As the black sparks started flying, the bird summon stood no chance against Keitaro's overwhelming might.
'He landed a Black Flash. His curse technique is most likely back by now,' Sukuna thought to himself.
Gojo, noticing that Sukuna wasn't paying attention to him, focused Infinity into a needle point and then used Blue like a sniper round, piercing through six of Sukuna's Shikigami and nearly hitting the King of Curses' heart.
'Dangerous,' the King thought to himself.
Satoru began sending out slashes, a bunch of Blue waves working like blades as they came at Sukuna, slashing into the King of Curses. Though his RCT was fast, the wounds healed as quickly as they were dealt.
Keitaro formed a Rasengan in his hand. Gojo sent a Blue toward it.
Blue + Mirage Rasengan = Implosive Sphere.
Keitaro teleported it near the King. The explosion folded space inward, crushing everything around it.
Sukuna's arm tore clean off, but he only laughed, as the Deer's healing once more restored his hand.
Okay... this was getting fucking annoying.
As Gojo was left to deal with Sukuna, the King of Curses seemed to be getting excited. Before Gojo knew it—
BLACK FLASH.
The sparks danced across Gojo's body as Sukuna landed the first hit. Then, without missing a beat—
BLACK FLASH.
A second one connected, sending the Honored One crashing through the domain walls, blood dripping from his mouth.
Keitaro teleported to Sukuna before the man could strike Gojo again. As for why Sukuna could touch Gojo during a domain clash—well, it had something to do with a vow Gojo made himself.
By turning off his Infinity, his sure-hit was amplified, and his barrier strengthened. He went from being able to tank it for five minutes to ten minutes no problem.
Anyway, Sukuna's hands were cut off by Keitaro, slicing all four of the beast's arms in a single motion.
The King of Curses just laughed. RCT burned through him, and his arms grew back instantly.
"Persistent bastard," Keitaro muttered. He cut them off again. Same result. Healed instantly.
Sukuna roared, his aura skyrocketing.
"Domain Expansion: Malevolent Shrine."
Keitaro's eyes widened. The fuck—was he stacking domain expansions on top of each other? What kind of overpowered author-favorite bullshit was this? Who the hell was sucking off Sukuna's dick like this?
Feeling like Satoru's domain was about to shatter, Keitaro had no choice but...
"Domain Expansion: Mirage Labyrinth."
As he did that, Satoru shattered his own barriers. While this put him on curse technique burnout, he could heal that shit pretty quickly.
Keitaro began to beat on Sukuna like no other, pounding the ever-living dogshit out of the King.
Sukuna kicked Keitaro away before making a handseal.
"Fuga."
As he launched his flaming arrow, Keitaro didn't hesitate to summon his full power Indra Arrows.
As the two attacks clashed in midair, Keitaro's arrow went right through Sukuna's flames before hitting the King again—
KABOOM.
As the smoke cleared, Sukuna looked like a charred corpse. From the look of it, he had used domain amplification to survive the whole ordeal.
Meaning Mahoraga didn't adapt to shit. Good—that was the only way Sukuna could have survived.
Without giving Sukuna time to heal, Keitaro was once more on his ass, like a senior seeing a freshman for the first time.
Sukuna needed distance, so he summoned Agito. He knew it wouldn't last long; he just needed it to buy three seconds, enough to somewhat heal.
But the moment Agito lunged forward—
BLACK FLASH.
Keitaro's fist crushed its skull.
As Agito's body was sent flying toward Satoru—
BLACK FLASH.
And just like that, Satoru regained access to his curse technique. He even used Blue to utterly destroy the beast.
Agito was gone. Instantly.
Sukuna's eyes widened, but he didn't have time to react.
BLACK FLASH.
Keitaro's strike rocked his chest.
BLACK FLASH.
Gojo's fist shattered his jaw.
The King of Curses was knocked flat, his body twitching, the ground beneath him cracking apart. For the first time, Sukuna looked helpless.
He had been knocked out, his domain shattered behind him, both of them—but before they could reach him—
He was summoned.
Mahoraga.
The wheel turned once as the beast rose from the abyss. Its mere presence was suffocating.
"Got ya," Keitaro grinned with a shit-eating smile, cocking his fist back. His punch landed so hard the beast puked out blood.
BLACK FLASH.
Mahoraga was sent flying toward Gojo, a faint trace of red energy around its body—the remainder of Gojo's Red.
As Mahoraga body-slammed into the Blue—well...
Hollow nuke.
It was reduced to nothing but ash. Now it was time to get rid of Sukuna, the goddamn cockroach who always found a way to survive.
Sukuna, however, wasn't done.
He attempted to destroy his brain and heal it again... but he noticed something odd.
He was seeing upside down.
Keitaro had sliced his head off. Sukuna's domain had fully shattered. He had been defeated.
Keitaro and Satoru were both above seventy-five percent of their curse energy pool, while Sukuna was at fifty percent.
{Simulation End}
{Winners: Satoru and Keitaro}
{100k Simulations Generated}
{Ryomen Sukuna wins in 1k}
{Satoru and Keitaro win in 99k}
The kind of bullshit needed to pull off a semi-decent fight was insane. Keitaro had to glaze Sukuna to no end, but the best he could do was a mid-difficulty fight. Oh well—it was fun to watch.
And while Keitaro didn't go all out, he did go Sage Mode—he didn't fuse with Akane. Fusing with her would have given him a significant buff, think KCM2-level. TL;DR: the King was cooked.
Well, it was a fun fight. Maybe in the future, Aaron should simulate:
Sora {Pre-Soul King Power Awakening} vs. Yhwach.
Basically, what if Aizen never fought Sora? This fight would be a lot more fun, since it's an extreme difficulty match. None of his business for now.
"Aaron... dinner's ready."
"Coming, Miyuki."
Welp, that would have to do for now. A hot wife was waiting for him—the simulation could wait.
Though a Sora vs. Gabriel fight would be awesome to see.
If you want, I can continue this next by building in the aftermath banter between Keitaro, Gojo, and Aaron reacting to the absurdity of the simulation results, keeping your humor and chaotic energy intact. That way it flows naturally into your story's "home life + Shoko & baby" scenes.
Do you want me to do that next?
A/N End, took a while but its done.
Note to reader the 1k SUkuna won are version when Keitaro do very dumb shit, like very dumb shit, and is not in character or something like that, they are quite litteraly version where the fight end with Keitaro one shotting Sukuna by slicing his head off when he is making the domain handseals, they are other version when he simply wait outside Sukuna barrier for timer to run out before he kill him while he weak, tldr, if you expected him to win, you must have his dick far down your throat.