A/N: GOOOOOOOOOOOD MORNING!

I lied when I said January HUEHUEHUEHUEHUEHUEHUEHUE!

Gonna do the boring but important talk, so please read for the story experience to be better

First of all, please be respectful and do NOT talk about spoilers in the comment

I will not joke about it, and instantly block the people that talk freely about spoilers without any shame

People are either anime-only, or discover the manga through this fanfiction, so PLEASE do not ruin it for them

This story is a Jujutsu Kaisen x Male Reader, as you may all have understood

HOWEVER! There isn't ANY love interest, either it is woman or man

So no, you won't have Nobara being with you, or Sukuna eating your limbs while saying romantic stuff

My aim for this story is something else, a good fusion between the reader developpement, and the lore of Jujutsu Kaisen, that actually make sense, but mostly that is balanced

I could have go with the usual OP reader that is so strong even Sukuna and Gojo teaming up wouldn't even make him feel warmed up

But that's not the case here. Yes, the reader is strong, but there is always a downside right?

And for the readers ability, I will explain as the story goes on. So please do not comment every time "What does this ability do? Can you tell us?". It wouldn't be fun, and just ruin the feeling of discovering an ability, the same time the oppenent does(like how it was shown many times in the manga)

For anyone wondering if they can translate my stories into foreign languages, come and ask me in DM, so that we talk about it

This story will cover EVERYTHING the manga did, going from chapter 1, to the latest chapter released(even the future chapters released in the manga)

For Jujutsu Kaisen 0, the same will happen, but we are not here yet

Anyway! I talked enough I guess, so let's start with the story!

A thousand year ago, in the Heian era, and also the golden age of the Jujutsu, the sorcerers gathered to fight against a common foe, known as Ryomen Sukuna, the king of curses

A former human with 4 arms and eyes, he truly deserved his title, as the king of curses

His strengh, power, and control over the curse energy was beyond everything they imagine, and such, they were wiped out of the planet

The fear of Sukuna's reign was at it's peak, as no one could even stand in his way, in the risk of being killed

But..... ultimately, he was sealed

'How? No one in this era was strong enough to beat him, so how could he be sealed?' You may say

Then allow me to tell you how someone brought an end to his terror

A young woman, close to her twenties, decided that she couldn't let her close ones live in fear for the rest of their lifes, and went to face Ryomen Sukuna

Seeing this act, Sukuna was confused. Was it foolishness, or courage? He couldn't know, but it amused him

Sukuna: Do you truly think you can even achieve anything with this weak body? You cannot even control curse energy properly!

???: I do not care! I will not back down, and ultimately, I will strike you down, Ryomen Sukuna!

She pointed her sword at him, a fierce glare on her face

???: Such is, my goal!

Their battle was fierce, and unforgiving

Each blow was meant to kill, and not give a chance to their oppenent to recover

But the result was obvious, and Sukuna had the upper hands

Sukuna: I must praise you, you did fought well. You are quite better than the ones I fought in the past. But you are still not close enough to my level

???: No...... I cannot give up.... I will bring your reign of terror to an end, and will bring peace to everyone!

Her eyes glowed, as her pupils changed color

???: I will be! Your Finality!

The area around them changed completely, as Sukuna grew shocked

But soon, this shocked soon turned to excitement, as he had a wide grin on his fae

Sukuna: A domain! You really are something else! I will have such pleasure killing you! Tell me your name!

??? spoke her name, as the king of curses smirked

Sukuna: Then, I shall never forget you, and curse your bloodline for eternity!

???: And I shall never let you live freely! Through my bloodline, I will always be, your finality!

Their fight started again, as it wasn't as one sided as before

It ended up with Sukuna's loss, getting sealed through his 20 fingers, using a powerful curse technique, so that as long as the seal is on, he will never be able to escape

The young woman died in the fight against the king of curses, but still, she managed to let her loved ones

In the end, she died without regrets

Her loved ones decided that her history shall be known by no one except them, and hide the truth on how Sukuna was sealed

They didn't wanted to be part of the world of sorcerers, and it was understandable

But the curse Sukuna placed on them, it wouldn't be as they wished

They were forced to train and fight curse in one ultimate purpose

Die to destroy Ryomen Sukuna, once and for all

In our time

???: And such, your reason to live is to die, do you understand?

A woman was seen speaking to a child, barely 5 years old, as the young one only looked down

Woman: I asked you something. Answer me, Y/N

Y/N: Yes.... Mother......

Mother: Good, now go back to your training. You need to unlock your hereditary technique. Not like I'm waiting much from you anyway

The young Y/N nodded, before going to the training room, before taking his stance in front of the training puppet, made for his training

The technique of Finality, as the first L/N called it, was the perfect counter against either sorcerers, or curses

The concept was to bring an instant end to curse energy hit by the attack, leaving the sorcerers defendless, and kill instantly any curses

However, such power always come with a downside, and this one wasn't to take lightly

It may bring an instant end to curse energy, but it also means the user too can be hit by that attack. And if their own attack hit them, they will die a painful and slow death, as their own power will consume every inch of their body

After such discover, a rule was made. The first child shall try to unlock their ability at a young age, and see if they can master it. And if by any bad luck, they will die, the parents shall give birth to another child, and it will repeat, again and again.....

Throughout the 1000 years, only 3 person survived the discover of the hereditary technique at the age of 7. But they never got past the age of 12, as their power was too strong for their body to handle

Elder: Focus! Your training comes before anything else!

Y/N: Yes....!

The young one known as Y/N was a gentle soul. His kindness ruled most of his action, and forged his morale

And his family's morale, was everything he hated

They had no consideration for human life, and only their purpose against curses mattered. They never connected to the outside world, except a few sorcerers that had closed link through history with them

But in the end, he was only seen as a tool, and it haunted him

He started to attack the puppet, that didn't budge from his weak hit

Y/N: I won't be a tool....... I will never be anyone's tool....

Elder: More strengh behind your hits! You won't be of any use if you stay this weak!

His curse energy started to grow, as he gritted his teeth

Y/N: I will be the one I choose to be, even if they don't like it!

His eyes started to glow, as his hit got stronger

Y/N: I will put an end to this suffering! I will stop this curse!

His iris changed, making a sort of purple 'X' in his pupils

Y/N: I will be! Myself!

With one swift move, the puppet was cut in half, and such was the wall behind, as in Y/N's hand, was a pure blade of curse energy

The commotion brought everyone of the house to the training room

They saw the state of Y/N, and couldn't believe their eyes

He was the 4th one to unleash his hereditary technique, but he was the first one, to do it at the age of 5

He was perfect for them. He was the perfect weapon to destroy Sukuna, once and for all

He was the embodiment, of Finality

And such started...... the hell he called his life

Prologue: Finished

A/N: I hope you enjoyed the prologue of this story. The chapter 1 is ready, and will release soon enough, most likely, a day? I don't know yet

See you all soon