In a world where even silence hides secrets, the very air hums with an ancient force known as KAI.
It flows through everything—through the whispering skies, the restless oceans, the roots of towering forests, and the veins of every living creature. Beasts once fragile evolved into formidable lifeforms. Vegetation flourished with unnatural vitality. The world itself breathed… alive with power.
For centuries, humanity remained blind to it.
Until they weren't.
Through relentless discovery, humans uncovered the art of cultivation—a path to harness the hidden life-force within. Yet not all were chosen. Only half of the world's population—50%—could awaken KAI within themselves. Those who did rose beyond ordinary limits, refining their bodies and souls. Strength, agility, endurance—each step forward forged warriors capable of reshaping destiny itself.
But power does not choose sides.
While many walked the path of discipline and honor, others strayed—twisting KAI for selfish ambition. They cloaked their desires in darkness, calling it necessity… calling it evil. And though justice prevailed time and time again, restoring balance—
That balance was never meant to last.
Then came the impossible.
A man… born without KAI.
An outcast in a world defined by power, he refused to accept his fate. Driven by obsession, he delved into forbidden research—experimenting on creatures beyond human comprehension. He failed. Again and again.
Until failure… became something far worse.
He discovered something new.
Something wrong.
A corrupted force—an inversion of KAI itself.
He named it KAINE.
Unlike KAI, it did not nurture. It consumed.
It devoured his humanity, reshaped his body, and flooded his being with destructive energy beyond control. In his rebirth, the world witnessed something it had never known—
The first of its kind.
A DEMON.
What began as one became many.
With power that defied nature, he slaughtered entire civilizations, raising the fallen as twisted servants through dark necromancy. His army grew without limit, his strength without equal. Ascending beyond all existence, he became the Great Demon Lord—LICGT.
War followed.
A war that drowned the world in despair.
Humanity fell. Kingdoms crumbled. The strongest warriors were reduced to corpses beneath his feet. Victory was no longer a question—it was inevitable.
Until…
A single figure descended from the heavens.
Cloaked in black. A red scarf dancing in the wind. His presence alone bent the battlefield into silence. From him radiated a pure, overwhelming aura—golden KAI, brighter than anything the world had ever seen.
His blade spoke where words did not.
Demons—weak and mighty alike—fell before him as if the very concept of defeat followed his steps. His crimson eyes burned with unshakable resolve. No fear. No hesitation.
Only purpose.
A one-man army.
A legend in motion.
And when he stood before the Demon Lord himself…
The impossible happened once more.
LICGT was defeated.
Sealed away within the Void Citadel—a fortress suspended beyond reality, bound by immeasurable anti-magic, unreachable by any ordinary means.
Peace returned.
Or so the world believed.
Because evil does not die so easily.
Even in imprisonment, the essence of KAINE lingered—corrupting, spreading, evolving. Chaos once again took root, quietly poisoning the balance that had been restored.
And the one who saved them?
He vanished.
Gone without a trace.
A thousand years have passed since that day.
Now, humanity prepares.
Great academies rise across the world, training new generations to master KAI… to climb the ranks… to become something greater.
To become like him.
The one they could never forget.
The one they could never replace.
They call him only one name—
The Legend.
Hero Rankings:
Beginner [lv: 1-20]
Amateur [lv: 20-40]
Rookie [lv: 40-60]
Professional [lv: 60-100]
Top Class [lv: 100-1000]
World Class [lv: 1000-1500]
Inter-World Class [lv: 1500-2000]
Legendary [lv: 2000-???]