One Piece: SSS-Rank Haki at Age Seventeen

"…Haaah. We got careless."

Sanji took a hard drag from his cigarette, his face slightly pale.

With his current strength, there were barely any opponents left on the seas capable of instantly overwhelming him—aside from monsters standing at the very peak of Emperor-level combatants like Luffy.

But this creature was different.

The Song Demon King Tot Musica possessed power that was simply too bizarre.

Its attacks carried dark rhythms that struck directly at the soul itself.

One careless mistake, and you'd be dragged into an endless abyss of melody.

"So what exactly are we supposed to do? That thing looks… completely impossible to kill."

Law tightened his grip on Kikoku, his sharp gaze fixed on the churning black fog ahead.

The Demon King's body had clearly been sliced apart and shattered—

Yet it rapidly reconstructed itself amidst shrill singing, as though its existence rose and fell together with the very melodies of this world.

Frowning deeply, Law glanced sideways toward Rayleigh, who still stood calmly at the front.

"It's definitely troublesome."

Rayleigh finally spoke, gravity forged through decades of battle resting in his eyes.

The sword in his hand emitted a low hum while black Armament Haki flowed across the blade like liquid.

"Ordinary attacks will simply be absorbed or reconstructed by it…"

"We must synchronize perfectly with Luffy's rhythm. Only by striking simultaneously from both inside and outside can we completely destroy the 'core' of its existence."

Yet Tot Musica was far more than a mere gimmick-based monster.

The pressure blanketing the heavens—

The force behind every swipe of its claws that shook space itself—

Had clearly already reached the very peak of elite Admiral-class strength .

Combined with its near-immortal regenerative properties…

It was an absolute nightmare.

"…Hah."

Rayleigh slowly exhaled.

The hesitation in his eyes vanished instantly, replaced by tranquil determination.

He poured everything into his sword—

Flowing Armament Haki.

Surging Conqueror's Haki.

Even the sword intent forged through countless years.

The blade began vibrating with a deep resonant hum.

Even the surrounding light warped around it.

"You three keep it occupied. Use whatever methods you can."

Rayleigh's voice was as steady as iron.

"I'll handle the rest."

If even this sword strike failed to sever its cycle of rebirth—

Then they'd have no choice but to try again another day.

"Understood!"

Yamato swung Hassaikai through the air, frost and Haki wrapping around the massive kanabo.

Sanji stepped forward with lightning crackling beneath his feet.

Law silently expanded his ROOM, enveloping the battlefield.

The three answered in unison before charging toward the reformed black Demon King.

Meanwhile, Rayleigh closed his eyes.

Sword in hand—

It felt as though he were grasping the very flow of victory and defeat itself.

"ROOOOOOAR—!!!"

Tot Musica completely lost control in fury.

It was the Demon King that ruled over melody and eternity—

Yet it had actually been wounded at its source by mere "insects"?!

Its damaged wings exploded outward violently.

The black fog filling the heavens boiled completely, transforming into a catastrophic tide that swept toward everyone.

Within the sea of darkness, countless soldiers clad in black armor materialized one after another.

Each held a ghostly glowing spear as they charged in total silence—

Yet every step shook the earth.

"Leave them to me!"

Yamato shouted sharply.

Her body expanded amidst streaks of light as she transformed into her powerful hybrid form.

She slammed Hassaikai heavily into the ground while unleashing the icy divine power of the Okuchi no Makami alongside her overwhelming Conqueror's Haki without restraint.

"Glacial Realm: Stainless Mirror World!"

In an instant, a freezing blue halo exploded outward from her position.

Wherever the frost spread, the battlefield transformed into a silent mirror-like world of crystal ice.

The ground became smooth frozen mirrors reflecting the twisted heavens above.

The air condensed into floating ice prisms radiating frigid light.

CRACK—CRACKCRACK!

The surging flood of darkness and demonic army froze the instant they touched the Mirror World.

Their charging forms.

Their writhing malice.

Even the fluctuations of space itself—

Everything was sealed into crystalline tombs of ice, becoming a magnificent yet horrifying frozen tableau of destruction.

"Well then… time to clean things up."

A calm, low voice echoed between the ice mirrors.

The ember at the tip of Sanji's cigarette carved a bright arc through the pure white world.

His hands remained in his pockets—

Yet his body had already transformed into a dazzling streak of violent lightning.

There were no footsteps.

Only the faint hum of ionized air and the countless afterimages reflected through the ice mirrors.

"Lightning Flash: Gentleman's Ovation."

Sanji suddenly halted mid-movement.

His right leg rose like a battle axe while blue-white lightning no longer merely wrapped around him—

It erupted directly from within his body itself.

As though his entire leg had become lightning incarnate.

Then—

SHING! SHING! SHING! SHING!

It wasn't a single kick.

Hundreds—thousands—of lightning kicks erupted simultaneously!

The violent barrage formed a massive net of thunder across the battlefield.

Every strike landed with pinpoint precision upon the frozen cores of the demon soldiers or tore apart black fog attempting to regenerate.

Lightning's speed and conductivity were pushed to their absolute limits.

Targets shattered from paralysis and internal destruction before they even fully broke apart.

The battlefield was cleared in mere moments.

Even deadlier—

A concentrated streak of azure lightning pierced through the frozen mist like a gentleman's deadly kiss transcending space itself.

It struck directly into one of Tot Musica's massive joints.

The gigantic Demon King suddenly stiffened.

Its savage roar stopped abruptly.

The black fog wrapped around its body froze unnaturally for a brief instant.

"NOW!!"

Law's pupils contracted sharply like a predator locking onto prey.

He thrust his left hand outward violently, fingers gripping invisible authority itself.

"ROOM!"

BUZZZZ—

A massive translucent blue domain expanded outward.

Larger and denser than ever before.

It enveloped not only the Demon King—

But also the entire "Mirror World" and "lightning pathways" created upon the battlefield.

Within this absolute domain under his control—

His advanced Observation Haki fused perfectly with the spatial awareness granted by the Ope Ope no Mi.

The world became "disassembled" in his eyes.

Inside Tot Musica's gigantic chaotic body—

The flow of countless energy veins and structural nodes appeared clearly before him like an intricate anatomical diagram.

The flickering dark cores.

The regenerating pathways.

Weak points everywhere.

Half a month of hellish training had sharpened more than raw power.

It had deepened his understanding of "cutting" itself.

"…I see it now."

Law murmured softly.

"Your line of death."

His right hand rested steadily upon Kikoku's hilt.

The spatial power of the Ope Ope no Mi intertwined with the high-frequency vibration and internal destruction properties of advanced Armament Haki.

Like surgical threads spiraling together along the blade.

He stepped forward.

Then swung.

The movement was unbelievably simple.

No wasted flourish whatsoever.

"Pulse Severance: Fate Line."

SHING—!

A pale thread of light extended from the blade—

Thin as silk.

Yet seeming capable of slicing space itself apart.

It silently swept through the frozen mirror world.

Even light distorted faintly where it passed.

The line pierced effortlessly into Tot Musica's gigantic body.

Then—

A smooth pale slash hundreds of meters long suddenly appeared across the Demon King's chest.

No blood emerged from the wound.

Only violent collisions between spatial turbulence and black energy.

Even more terrifying—

Fine pale ripples spread continuously from the edges of the slash.

The power of the Ope Ope no Mi was actively disrupting the Demon King's terrifying regeneration and energy circulation.

Like the world's most precise surgery—

It severed the most crucial nerves and energy pathways.

A tiny human body—

Had unleashed a slash capable of killing a god.

Tot Musica completely froze.

Its crimson eyes filled with rage and incomprehension locked onto the tiny swordsman below for the very first time.

Meanwhile — Inside the Sing-Sing World

This place was the melodic hell corresponding to reality.

The sky remained permanently dark violet.

The earth was cracked apart, flowing with sticky swamps of musical notes.

Black fog ten times denser than the real world writhed like living creatures.

Within it, countless demon soldiers charged endlessly, hollow soul-flames burning inside their empty eye sockets.

Massive black tentacles the size of mountain ranges lashed violently from the depths of the fog sea.

Every strike shook the entire world.

Worst of all—

The eerie song echoing everywhere screamed directly into the soul, attempting to drag all consciousness into eternal melodic oblivion.

"Tch… this really is kinda troublesome."

Within this hopeless landscape, a single silver-white light flashed endlessly across the battlefield.

Luffy's speed had already surpassed visual perception entirely.

His Infinite Blink movement made it seem as though he existed simultaneously at countless points in space.

Blades.

Tentacles.

Binding soundwaves.

No matter how overwhelming the assault became, everything merely passed through afterimages.

Not even the brim of his straw hat was disturbed.

Was the Song Demon King weak?

Absolutely not.

Within this world built entirely from melody and obsession, Tot Musica's avatar possessed enough power to push ordinary Emperor-level fighters into desperate battle.

But even among Emperors—

There were levels.

Luffy's combat style had already entered an entirely different dimension.

Future Sight allowed him to observe the battlefield like a completed chessboard.

Before killing intent even arose, he already knew its trajectory.

Infinite Blink let him transcend the board itself, turning space into his own personal dance floor.

The combination of both abilities created absolute lawlessness.

"Everyone's gotten way stronger…"

As he moved, a flicker of surprised red light crossed Luffy's eyes.

His immensely powerful Observation Haki, strong enough to pierce through dimensions themselves, allowed him to simultaneously "see" the real-world battlefield.

Yamato's frozen Mirror World.

Sanji's lightning web of gentlemanly kicks.

Law's slash that severed fate itself.

Under the amplification of his system's [Potential Doubled] effect, the results of their half-month hell training were terrifying.

They had progressed through what would normally require over half a year—or even longer.

Especially Tra-guy…

That guy had always been a genius who fought using tactics and rules.

Once his potential ignited, his growth naturally exploded the most.

Well—

Mostly because he had the most room to improve.

…Okay fine, because he used to be weaker.

The distraction lasted only a moment.

Luffy's gaze soon pierced through the black fog and demonic shadows toward the highest point in the heavens.

There—

A cocoon of concentrated darkness wrapped tightly around a curled-up figure.

Uta floated within it.

Her brows were tightly furrowed.

Pain and struggle filled her face as though her soul itself was being torn apart.

The playful grin on Luffy's face slowly faded.

What remained was calm determination as deep as the sea itself.

The power of the Hito Hito no Mi, Model: Nika roared silently within him.

Sacred silver-white light flowed faintly around his body.

"Wait for me, Uta."

His quiet voice cut through the chaotic song itself.

Filled with undeniable conviction.

"You've gotta hold on!"

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