"Raiden-kun, you are the strongest person on this planet."
The voice of Kaguya Ōtsutsuki was calm and ethereal, yet there was unmistakable sincerity within it.
"If we allow Isshiki Ōtsutsuki to continue developing unchecked, your world will inevitably be destroyed."
Her pale Byakugan eyes looked directly at the young man before her.
"And I will never become a sacrifice to that monster. I only wish to live peacefully with the one I love."
Her gaze sharpened.
"Why don't we join forces?"
"We can set a trap for Isshiki and feed him to the Ten-Tails."
"When the Divine Tree bears its Chakra Fruit, it will belong to you."
Kaguya slowly extended her hand—an olive branch offered to the silent young man before her.
Raiden remained seated on the stone platform, staring at her quietly.
He did not respond.
It seemed as if he were weighing the consequences of opposing Isshiki.
The cave fell into silence.
After a long moment, Kaguya's expression gradually dimmed.
"If you have not decided yet, that is fine."
"In a few days, I will be offered to the Ten-Tails."
"If you make up your mind… come to the Land of Ancestors and find me."
Her voice faded.
Her figure blurred slightly—
and disappeared silently from the cave entrance.
The cave returned to silence.
Raiden Arashi sat alone on the cold stone seat, deep in thought.
Because in truth—
he did not originally belong to this world.
He was a transmigrator.
When he first arrived, he believed he had somehow traveled to ancient Japan.
That illusion lasted until one day—
two streaks of light tore across the sky.
Then he saw it.
A colossal creature whose mere presence distorted the landscape.
The Ten-Tails.
At that moment, Raiden finally understood.
This was not ancient Japan.
This was the primordial era of the world depicted in Naruto.
From that day forward, Raiden pursued power like a madman.
His goal was simple.
Immortality.
Only eternity mattered.
As the old saying goes—Heaven helps those who help themselves.
During his wanderings, he miraculously discovered the sacred land of sages:
Mount Myōboku.
The toads of Mount Myōboku possessed the legendary Sage Arts, a natural energy cultivation method that had existed since ancient times.
Raiden's talent was extraordinary.
Not only did he master Sage Techniques—
he pushed them to their absolute limit.
Unlike normal Sage Mode users such as Naruto Uzumaki, who must gather natural energy temporarily, Raiden achieved something far rarer.
His body permanently harmonized with natural energy.
He existed in a constant sage state.
No time limit.
No transformation phase.
Natural energy flowed through him endlessly.
And then—
fortune struck again.
The same year he perfected his Sage Arts, a system descended.
The system presented him with two choices.
OptionOne:InvincibleforOneHundredYearsOption One: Invincible for One Hundred YearsOptionOne:InvincibleforOneHundredYears
Rewards:
Tomoe RinneganChakra FruitŌtsutsuki Body
Price:
After one hundred years of invincibility, death will arrive instantly.
No extension of life is possible.
OptionTwo:TheImmortalOption Two: The ImmortalOptionTwo:TheImmortal
Reward:
Eternal lifeEndless lifespan
Cost:
Your strength will forever remain at Super Kage Level, permanently unable to cross the Six Paths threshold.
You will remain infinitely close to it—yet never reach it.
Unless a miracle occurs.
Raiden didn't hesitate.
Not even for a moment.
In his eyes, eternity was the truest form of art.
What was one hundred years of glory?
Even a century of domination could never compare to witnessing a thousand years of history unfold.
Thus he chose—
Immortality.
At that time, the great figures of the future ninja world did not yet exist.
Names like:
Madara UchihaHashirama SenjuKakashi HatakeSasuke Uchiha
were still far in the future.
With Super-Kage level power, Raiden was already among the strongest beings alive in this era.
His original plan had been perfect.
Wait.
Hide.
Survive.
Outlive:
KaguyaThe Sage of Six PathsIndra ŌtsutsukiAsura Ōtsutsuki
Once those legendary figures had turned to dust, he would re-enter the world.
Safe.
Uncontested.
Immortal.
But fate had other plans.
One day, while helping a nearby villager, he encountered the ruler of the Land of Ancestors—traveling together with Kaguya.
The emperor was merely human.
He sensed nothing unusual.
But Kaguya possessed the Byakugan.
And the perception of an Ōtsutsuki.
She instantly recognized Raiden's abnormal chakra.
At that moment, Raiden almost summoned a toad and escaped immediately through reverse summoning—
but it was already too late.
And thus—
Kaguya had come personally to his door today.
"Should I help her… or not?"
He rubbed his chin thoughtfully.
Truthfully speaking—
Isshiki Ōtsutsuki was terrifying.
His abilities were monstrous.
Daikokuten — a dimensional storage space where time does not flow.Sukunahikona — the ability to instantly shrink himself and objects to microscopic size.
These powers rendered most ninjutsu useless.
In taijutsu alone, Isshiki could overwhelm even the future strongest shinobi.
Charging recklessly could easily result in death—
impaled by black rods before even understanding what happened.
But then—
another thought ignited within Raiden's mind.
The Chakra Fruit.
The fruit produced by the Divine Tree.
After consuming it, Kaguya gained near-limitless chakra and became the supreme being of the ninja world.
If he ate it—
could it break the system's shackles?
Could he cross the boundary of the Six Paths?
The system had said:
Only an extraordinary opportunity could change his fate.
Could this be that opportunity?
Raiden narrowed his eyes and opened the system panel.
Name: Raiden
Physique: Immortal
Lifespan: ∞
Abilities:
Perfect Sage ModeToad-Style Sage TechniquesApe Demon Clan Staff Technique
"With my current strength… fighting Isshiki alone would mean a ninety-percent chance of death."
He muttered to himself.
"But if Kaguya ambushes him…"
In the original story, Kaguya had indeed caught Isshiki off guard.
Which meant—
the plan had a chance.
And if they succeeded—
the Chakra Fruit would represent a qualitative leap.
Sometimes the wisest move…
was to gamble everything.
Besides—
he had a final escape route.
If things went wrong, he could instantly retreat through reverse summoning back to Mount Myōboku.
Safe.
Untouchable.
Raiden's eyes flashed.
Decision made.
"Alright."
"I'm in."
He grinned.
"Take a gamble—"
"Your bicycle might just turn into a motorcycle."
Without hesitation, he began preparing his tools.
The ritual materials would naturally come from old friends at Mount Myōboku.
After so many years in the ninja world, he had long formed deep bonds with the toads there.
"Reverse Summoning Technique."
No hand seals.
Raiden simply whispered the incantation.
The jutsu activated instantly.
Moments later—
he appeared in the sacred land of sages.
Mount Myōboku.
The place looked almost identical to how it would appear thousands of years later.
Ancient stone temples.
Endless giant mushrooms.
Natural energy flowing through every corner.
Even in the future, when the Infinite Tsukuyomi engulfed the ninja world, Mount Myōboku remained untouched.
A true sanctuary.
Raiden walked casually toward the great toad temple.
Just as he arrived—
a familiar voice greeted him.
"Oh?"
"Raiden, you're here?"