Jujutsu Kaisen: I was killed by Sukuna

First, let me start with the basics.

I'm a reincarnator. 

I was born into an ordinary family, lived an ordinary student life, and had ordinary hobbies—I was just a regular person. 

My hobbies were games, anime, manga, movies—basically, I loved entertainment and was a bit of a light otaku. That was me. 

But one day, on my way home, I bought a Jump magazine at a convenience store and was pedaling my bike, grinning like an idiot while wondering how my favorite manga would continue. 

Suddenly, a car crashed into me, turning my body into mincemeat. 

AND 

I died. 

There was no pain. 

The only saving grace was that it was instant death, so I don't remember the moment I died at all. 

All I know is that a car's headlights suddenly came rushing at me, and I thought, "Oh, I'm going to get hit and die." 

And so, after dying like that… I woke up as a child. 

I was being held by a woman, surrounded by men in traditional robes, all staring intently at me. 

Can you imagine? A bunch of strange men staring at me, a strange woman holding me… Honestly, it was terrifying. Nothing but fear. 

So, I cried. I opened my mouth wide and bawled. 

Looking back now, I think it was really good that I cried then. It helped me avoid being suspected of anything. 

And so, that's how I, Zenin Kai, was born. 

---

Yes, Zenin. 

That Zenin. 

When I heard that name, when I realized it, it all clicked for me… Ah, this is the world of Jujutsu Kaisen. 

From that point on, it was nothing but desperation. 

First, I tried to figure out the era. 

I needed to know what time period this was, what the situation was like. 

As a kid, I couldn't exactly go around reading books or wandering freely, so I just talked to the adults around me as much as I could to gather information. 

What I found out was that the emperor's name was Emperor Kanmu… which meant this was the Heian period. 

At that moment, I thought, "Oh no, this is the Heian era. Sukuna's around." 

Back before I died, I'd gotten interested in the Heian period's yokai and such through Jujutsu Kaisen, and I'd incidentally learned the emperor's name. That turned out to be a blessing… though it also plunged me into despair. 

From then on, it was beyond desperation—it was a fight for survival. 

Being part of the Zenin clan meant training started early, which honestly helped. I think I got a pretty good start because of it. 

First, they checked if I could see curses, and then they checked if I had a cursed technique. 

That's when my technique, the Ten Shadows Technique, manifested. 

Well, there was a lot of drama after that, but let's set that aside for now. The real problem came later. 

In this Heian era, where the chances of running into Sukuna were incredibly high, I desperately sought power. After all, if I didn't, I'd die. 

Thanks to that… or maybe because of it… by the time I was around 10 years old, I was already being sent out to exorcise curses. 

I thought I was going to die. 

There were so many times when the Ten Shadows saved me. If I hadn't had it, I would've died long ago. Every day was a living hell where death felt like a constant possibility. 

The fact that the information about curses was so inaccurate made things even worse. 

A report of a Grade 3 curse would turn out to be Grade 2, or a Grade 2 would turn out to be Special Grade or higher. 

Honestly, when I encountered a curse that used a Domain Expansion, I thought it was over. If I hadn't been able to use Falling Blossom Emotion and Shin: Shadow Style, I would've died without a doubt. 

If there was any saving grace, it was that my family was relatively sane by Zenin standards. 

Given the era, there was still plenty of misogyny, but at least my father didn't mistreat my mother or the servants. And my younger brother somehow ended up with a personality like Rengoku-san's. 

With no fear of my family sabotaging me or trying to assassinate me, I was able to focus on training myself even more. 

Along the way, my dad kept nagging me to get married, and my Six Eyes-wielding best friend kept asking if I was going to have kids. But I always brushed it off, saying it would either end badly or I'd die early and leave behind a widow. 

Well, in the end, that decision turned out to be the right one. After all, I ended up getting killed by Sukuna. 

---

It was around the time I desperately tamed Mahoraga. Sukuna appeared, and we—no, the sorcerers of the Heian era—gathered all our strength to challenge him. 

So… I decided to face him alone first. 

It was the same thing Gojo Satoru and the others tried to do in the future. 

If I won, great. 

Even if I lost, the next wave of sorcerers would take on a weakened Sukuna… That was the only plan I could come up with. 

Of course, my family and best friend were vehemently opposed. 

"Are you trying to die? Are you throwing your life away? We should all attack him together!" they argued. 

But I couldn't accept that. I knew what Sukuna's Domain was like. 

An unending Domain, a divine technique—I couldn't fight him while worrying about the people around me. 

More importantly, since my final move was essentially a suicide technique, I stubbornly insisted on fighting alone. 

After much persuasion, my family finally relented. 

With tears in their eyes, they told me to win and come back alive. 

My best friend, who never fully accepted my decision, left without a word. I haven't seen him since that day, but I'm sure he was watching over me. 

And so, with my family seeing me off, I challenged Sukuna… and got completely wrecked. 

I didn't expect to lose, and I did want to win, but in the end, I lost so badly that I couldn't even feel regret. 

But I achieved my goal: extracting information about Sukuna. 

Yes, my goal was never to win. 

I wanted to win, but I knew from the start that I couldn't. 

I wasn't arrogant enough to think I could defeat someone even Gojo Satoru couldn't beat. 

My goal was to leave behind information about Sukuna for future generations—details about his Domain and cursed technique for the Gojo Satoru who would be born later. 

I ordered my family to document everything about Sukuna and distribute it to the Three Great Families. 

I figured that as long as even one person survived, their fear of Sukuna would ensure they carried out my orders. 

Personally, I couldn't even draw out Sukuna's trump card, let alone his flames. But I'm sure the enhanced Mahoraga I summoned—let's call it True Mahoraga—will manage to draw that out. 

---

Well, with all that said, I was able to die in peace… but this is honestly beyond what I expected. 

---

Looking around, I quickly realized this was a traditional Japanese-style mansion. Judging by the scenery, I'm definitely in Japan. 

Next, I looked at myself—small hands, a small body, short limbs… I'd guess I'm about 5 or 6 years old. 

I tried summoning the Ten Shadows… but nothing happened. 

So, my technique is still unusable, meaning the binding vow is still in effect. 

"…What do I do?" 

The words slipped out. Seriously, what do I do? 

I thought that was the end, so I literally gave it my all. I didn't plan for anything after that. Who could've imagined being reincarnated twice? 

And because of the insane binding vow I made to summon True Mahoraga, I can never use my technique again. The despair is real. 

Honestly, what do I do…? More importantly, where am I? 

---

"…Kai?" 

Suddenly, I heard a voice. 

I looked toward the source and saw someone I knew very well. 

Ah, of course I know him. How could I not? He's the man I modeled my hand-to-hand combat after. 

Black hair, a scar by his mouth, a well-trained body, and the aura of an absolute powerhouse… Yes, there's no mistaking it. 

The man who temporarily overwhelmed Gojo Satoru in the past arc, even if it was due to a sneak attack and information leaks. One of my idols. 

The Heavenly Restricted, Toji Fushiguro… my idol was standing right there. 

---

Before I could even think, my body moved faster. 

I got up, toddled over to him, and then— 

"Big bro!" 

I hugged him tightly… Wait, big bro? 

As I nuzzled my cheek against Zenin Toji's—no, big bro's—well-defined abs, he gently patted my head. 

In that moment, memories that shouldn't exist flooded into my mind. 

Memories of Toji giving me piggyback rides, teaching me hand-to-hand combat (and beating me to a pulp), and even eating ramen together. 

We're not related by blood, but in my memories, he's my big bro… Wait, what am I doing? 

---

Wait, hold on. 

If big bro—no, Daddy Toji—is here… does that mean this is the Zenin household? 

…What? Again? The Zenin clan? Is the Sashisu group going to join later? 

…Crap, what do I do?