Sukuna's eyes widened. Just a fraction. Just enough.
Dismantle at one finger should have carved through a normal sorcerer like butter. Even a decent one should be missing limbs right now. This kid took it like a paper cut from a dull knife.
"Hoh." Sukuna's grin sharpened. "You're physically strong. Very strong. That reinforcement is no joke." He cracked his knuckles Yuji's knuckles, weird to see. "Dismantle won't do much at this output. Can't use Cleave yet, not enough fingers." He dropped into a stance. "Looks like we're doing this the old-fashioned way."
Shinra smiled.
"Finally."
They moved at the same time.
The first exchange was violent.
Sukuna threw a punch aimed at Shinra's throat fast, precise, the kind of strike that came from centuries of experience. Shinra ducked under it, drove his own fist toward Sukuna's ribs. Sukuna twisted, took it on the arm instead, and the CRACK of impact echoed across the rooftop like a gunshot.
Shinra felt the shock travel up his arm. Sukuna's reinforcement was no joke, even at one finger. But he also felt something else Sukuna's arm giving, just a little. Just enough.
I'm stronger.
Sukuna felt it too. His eyes lit up.
"Oh? OH!" He laughed genuine, delighted, the kind of laugh you only hear from someone who's been bored for a thousand years and finally found a toy. "You're actually stronger than me physically! In this body, at least!" He threw another punch, which Shinra blocked, then another, which Shinra dodged by inches. "This is EXCELLENT!"
They broke apart, circling.
Shinra's blood was up. Adrenaline, fear, excitement all of it mixing into something he'd never felt before. This was Sukuna. The King of Curses. Fraudkuna. The guy who needed Mahoraga to hold his hand through the Gojo fight. And he was trading blows with him.
Don't get cocky, he told himself. One finger. That's all he has. One finger and a body that's fighting him.
Still, another part of him whispered, this is insane.
Sukuna came at him again.
This time it wasn't just punches it was combinations, feints, strikes from angles that shouldn't work. A thousand years of combat experience poured into every movement. Shinra blocked, dodged, took hits he couldn't avoid, gave back everything he had.
A punch to Sukuna's jaw. A knee to his stomach. An elbow that connected with his temple and sent him stumbling.
Sukuna answered with a hook that cracked Shinra's ribs, a kick that nearly took his legs out, a headbutt that made stars explode behind his eyes. They were both bleeding now. Both grinning like idiots.
CRACK. Shinra's fist connected with Sukuna's cheek.
SMASH. Sukuna's knee drove into Shinra's side.
THUD. They crashed together, neither giving ground.
"You fight like a brawler!" Sukuna shouted, laughing through bloodied lips. "No technique! No style! Just pure aggression!"
"You fight like an old man!" Shinra shouted back, blocking another combo. "All that experience and you still can't put me down!"
"IMPROVEMENT REQUIRES CHALLENGE!"
They crashed together again.
And again.
And again.
Each exchange left them both more battered. Shinra's ribs were definitely broken multiple ones, he could feel them grinding. His left eye was swelling shut. His lip was split in three places. But he kept swinging. Kept pushing. Kept matching Sukuna blow for blow.
Because for the first time in his life, he felt alive.
This is it, he thought, blocking a kick and sweeping Sukuna's legs. This is what fighting feels like. Real fighting. Not training, not games actual life-or-death.
Sukuna hit the ground, rolled, came up grinning.
"You're enjoying this," Sukuna observed.
"So are you."
"Obviously." Sukuna wiped blood from his mouth. "It's been centuries since anyone made me work for a kill. You're special, brat. I'll remember this."
He came at Shinra again.
This time, Shinra felt something different. Not just the impact of blows something deeper. While they fought, while their fists connected and their cursed energy clashed, he started to sense something beyond the physical.
Sukuna's soul.
It was massive. Ancient. Wrong in ways he couldn't describe. But more than that he could feel the boundaries of it. Where Sukuna ended and Yuji began. The edges of possession.
Soul Perception, ROB's voice noted, almost casually. There it is. You're feeling it now. Keep fighting it'll get clearer. It looks like you are getting this on your own maybe your innate technique is related to souls? or is it because you are from another world?
Shinra didn't have time to respond. Sukuna was on him again.
But now he could see feel the split. Yuji's soul, dim and exhausted, pressed into a corner of their shared body. Sukuna's soul, bright and terrible, controlling most of it. And between them, a battle happening on a level no one else could perceive.
Yuji's fighting back. He's weak, but he's fighting.
Sukuna noticed Shinra's focus shift. His eyes narrowed.
"What are you looking at?"
Shinra didn't answer. He just kept fighting, kept pushing, kept hitting harder.
And then he felt it Yuji stirring. Yuji pushing back. Yuji, exhausted and grieving and barely conscious, trying to take control of his own body.
Now.
Shinra gathered everything he had. All his strength. All his cursed energy. All of it poured into one final punch aimed at Sukuna's chest right where he could feel the connection between the two souls.
The punch landed.
CRACK.
For one perfect moment, Sukuna's eyes went wide. His mouth opened in what might have been surprise or delight or both. The force of the blow sent him staggering back, Yuji's body shuddering, the tattoos flickering.
And then
"Nngh what"
Yuji's eyes blinked open. Confused. Tired. His eyes. Not Sukuna's.
Shinra stumbled back, breathing hard. His body was screaming. Ribs definitely broken. Cuts everywhere. One eye swollen shut. He was pretty sure something internal was bleeding. But he was standing. He was alive.
And Sukuna was gone.
DING!
[MISSION COMPLETE: Touch Some Soul]
Objective: Fight 1-Finger Sukuna and gain Soul Perception/Soul Awareness. ✓
Reward: Soul Perception/Soul Awareness Unlocked
DING!
[ACHIEVEMENT UNLOCKED: The Heavyweight Championship of Sorcery]
Condition: Defeat Sukuna in hand-to-hand combat using only CE reinforcement.
Reward: Armament Haki (Busoshoku Haki) The power to coat yourself in invisible armor and hit those who can't normally be hit. Stacks with CE reinforcement for maximum hands.
Shinra blinked.
Wait. What?
DING DING DING!
Rob's voice cut through, and for once he sounded genuinely surprised. Oh shit. You actually unlocked an achievement. I forgot I even put those in the system.
You FORGOT?
I made this thing in like five minutes while watching Netflix, cut me some slack. But yeah, achievements exist. Hidden ones, mostly. You just hit one of the harder ones. A pause. Armament Haki, huh? That's nasty. Lets you bypass durability, hit souls directly, basically turns your fists into weapons that ignore gimmicks. Combined with your physicals? Yeah, you're gonna be a problem.
Shinra wanted to process that. Wanted to figure out what Armament Haki meant for his fighting style. Wanted to
"You okay?"
Yuji's voice. Concerned. Confused. Completely unaware that he'd just been possessed by the King of Curses and used as a meat puppet.
Shinra looked at him. Bloody. Battered. Alive.
"Peachy."
---
That's when the air changed.
One second, normal rooftop tension with two exhausted teenagers bleeding everywhere. The next, presence so massive it felt like the world was holding its breath.
Gojo Satoru materialized behind Yuji like he'd been there the whole time.
"Hey there."
Yuji didn't even have time to turn around. Gojo's hand chopped against the back of his neck precise, controlled, exactly the right amount of force. Yuji's eyes rolled back and he crumpled.
Gojo caught him before he hit the ground.
Then those blindfolded eyes turned to Shinra.
Shinra suddenly felt very, very aware of how beat up he looked. Torn uniform. Blood everywhere. One eye swollen shut. Standing over an unconscious Yuji while Megumi was probably still dragging high school kids down the stairs.
"So," Gojo said, voice light, "anyone want to explain why my school smells like the King of Curses had a rager and didn't invite me?"
Shinra opened his mouth. Closed it. Tried to figure out where to even start.
"He ate a finger." Shinra pointed at Yuji. "Sukuna's finger. His friends opened it downstairs. Sukuna came out. We fought. He's back in there now. Probably."
Gojo was quiet for a moment. Then he looked down at Yuji's unconscious face, at the fading tattoos still visible on his skin.
"Huh." He poked Yuji's cheek. "So that's what a vessel looks like. Neat."
"That's your reaction?"
"I'm processing. Give me a second." Gojo poked again. "So you fought Sukuna. Hand-to-hand. And won."
"Didn't win. Just... outlasted. He only had one finger and Yuji was fighting him for control."
"Bullshit."
Shinra blinked. "What?"
Gojo's head tilted. That blindfolded stare was unnerving even when you knew what was underneath. "I can see your cursed energy, remember? You're walking around with reserves that rival Yuta's. You're standing over there like you just finished a light workout despite looking like you went ten rounds with a truck. And Sukuna's not out here killing everyone." He smiled. "So I'll ask again. What happened?"
Shinra met that invisible gaze.
"I fought Sukuna. Hand-to-hand. Survived. Figured out some kind of technique mid-fight lets me sense souls. It helped me hit him harder where it mattered." He shrugged, then winced because his broken ribs reminded him why that was a bad idea. "Yuji's strong. He was fighting back the whole time. I just... helped."
Technically true, ROB noted. You did figure it out during the fight. The fact that I gave it to you as a reward is just paperwork.
Gojo studied him for a long moment. Then his smile widened.
"You're interesting. I like interesting." He threw Yuji over his shoulder like a sack of rice. "Come on. We're going back to school. Megumi! Stop hiding and get over here!"
Megumi emerged from the stairwell, looking frazzled and confused and very, very aware that he'd just witnessed something impossible. His eyes kept darting between Shinra and Yuji like he was trying to do math in his head and the numbers kept changing.
"Gojo-sensei"
"Questions later. Walking now. Let's go."
He started walking. Shinra and Megumi exchanged a look Megumi's confused, Shinra's exhausted and followed.
Behind them, the rooftop was empty except for bloodstains and the memory of a fight that shouldn't have been possible.
---
The walk back was quiet.
Gojo led the way, Yuji bouncing on his shoulder with every step like a very unconscious backpack. Megumi kept glancing at Shinra like he was trying to solve a puzzle that kept rearranging itself. Shinra focused on putting one foot in front of the other without falling over.
You good? ROB asked.
No. But I'm walking.
That's something. Also, Armament Haki. You realize what that means, right?
I can hit harder?
You can hit the UNHITTABLE. Curses have true forms, remember? Mahito's soul bullshit? Armament lets you bypass all that. You punch something, it FEELS it. No gimmicks, no tricks, just hands. Combined with your soul perception? You're gonna be Mahito's worst nightmare.
Shinra thought about Mahito. About all the pain that little bastard would cause. About Yuji's friends he'd kill, about Nanami, about everyone.
Yeah, he thought. I'm gonna enjoy that.
They reached Jujutsu High as the sun was starting to rise. Gojo carried Yuji inside, presumably to lock him in some kind of containment cell until they figured out what to do with a teenager who accidentally became the King of Curses' hotel room.
Megumi stopped at the entrance, turning to face Shinra.
"That was real?" His voice was quiet. "You really fought Sukuna?"
"I really did."
"And you're not dead."
"Clearly."
Megumi stared at him. Then, for the first time since Shinra had met him, his expression cracked into something almost human.
"Who the hell are you?"
Shinra thought about it. About the question. About all the answers he couldn't give. About the list of frauds and goats in his head, about the timeline he was supposed to change, about the people he was supposed to save.
"I'm just some guy," he finally said. "Who got a second chance and decided not to waste it."
He walked past Megumi into the school, leaving Potential Man standing in the doorway with more questions than answers.
[END CHAPTER 4]