I AM EXTRA IN A SHONEN MANGA

The tide echoed in the cavern mouth, every wave slamming like the pulse of a heart too big for the earth to contain.

At the entrance stood two figures.

A younger man with slick, white hair combed neatly back, his smile too sharp to be kind.

Seirath Eluron.

Beside him towered a broad-shouldered man with hair the color of the deep sea and the black whale sigil tattooed across his back, gleaming under the damp cave light.

Nore.

Nore's deep voice broke the silence.

"I think this is where the fragment is…"

Seirath's grin widened, eyes glinting like a predator's. Without hesitation, the two of them strode deeper into the cave.

But the air shifted. The salty damp thickened into a heavier stench brine mixed with something… wrong.

From the shadows, a guttural snarl echoed.

"You!!!!"

The Fisher Man emerged half-flesh, half-scale, his barnacled skin slick with seawater, yellow eyes glowing with feral rage.

Seirath tilted his head, amused.

"Hoh. A fisherman."

But Nore's expression hardened as his eyes traced the creature's features. His voice rumbled, colder this time.

"You… that look. You are from the tribe of Uska… the Uska warrior."

The Fisher Man's voice broke, trembling with both fury and grief.

"You… that black whale sigil… you're from that tribe…"

Nore glanced back at the sigil etched into his flesh, then exhaled slowly.

"I'm exiled. That part of me is gone. Anyway…" His gaze turned toward the deeper shadows of the cave.

"…we came for the fragments sealed here."

The Fisher Man roared, lunging forward, his clawed hand scraping against stone, his voice rattling the cavern walls.

"Over my dead body!!!"

Seirath's grin curved into something vicious, eyes gleaming.

"Looks like words won't get through to him."

Nore stepped forward, rolling his shoulders, his voice even but heavy with intent.

"Let me fight him, Seirath."

But Seirath raised a hand, still smiling.

"No. Leave this one to me."

Nore frowned, studying his companion's face, the sharp grin, the hunger in his eyes.

"(Such a vicious face… It's like he enjoys this far too much.)"

Seirath's tone dropped, cold and final.

"If you resist… then we have no choice."

The Fisher Man bared his jagged teeth, voice hoarse with rage.

"You monster!!!"

With a desperate roar, he lunged.

Seirath didn't move at first. Then his hand snapped outward, Shinrei coiling like a blade of wind.

"Echo Art: Wind Slash."

The cavern screamed. Invisible edges carved through the air, slicing across the Fisher Man's body. Blood sprayed against the wet stone as the creature staggered, shredded by countless cuts.

He collapsed, gasping, his scaled hand twitching helplessly against the ground. Barely alive.

Seirath brushed the air with his palm, as if dusting off nothing.

"Pathetic. Let's go."

Nore nodded, though his eyes lingered not on the dying Fisher Man, but on the faint glow ahead.

The Fragment.

It pulsed faintly where it was sealed into the rock, wrapped in old wards and symbols half-eaten away by time.

The Fisher Man coughed violently, voice breaking.

"No… if you unseal it… that monster will revive… the village… the world—"

But Nore cut him off, his voice low and absolute.

"We don't care. We just want the fragments. The village means nothing to us."

The cavern walls shivered as saltwater dripped from the jagged ceiling, every droplet echoing like a drumbeat.

Nore placed his massive palm on the glowing ward. His Shinrei surged — a crushing tide of Wave Affinity grinding against the ancient seals. The runes hissed, buckled, and split apart like glass under pressure.

With a final surge, the ward shattered.

The Fragment, a jagged shard of black-crimson crystal, pulsed in the hollow of the rock like a heart ripped from some colossal beast. Its glow illuminated their faces — Seirath's twisted grin, Nore's cold calm.

Nore reached forward and plucked it free, the sigil on his back faintly resonating with the shard's light.

"Heh… mission success."

The Fisher Man, broken and bleeding, clawed toward them, his voice raw and desperate.

"No!!!!"

Seirath's boot slammed down on his jaw, pinning him to the stone. The man's muffled cry echoed through the chamber.

Seirath tilted his head, smirking.

"Shhh. Don't ruin the moment."

Nore glanced at the twitching body, irritation flaring.

"Should we kill him? He's kind of annoying."

But Seirath only chuckled, eyes alight with cruelty.

"No. Kekeke… it's better this way. Let him die looking at us with vengeance in his eyes… while we walk away with his precious thing."

The Fisher Man's yellow eyes blazed with hate, his body trembling under Seirath's boot.

Nore shook his head, exhaling.

"What a bastard."

Seirath just raised the fragment into the dim light, the pulsating glow reflecting in his pale eyes. His grin widened into something feral.

"Let's go. Kekeke."

The Fisher Man's voice tore free from his throat, broken, desperate.

"No… you don't understand!! That monster… that calamity from seventy years ago… it will come back—no!!"

The words echoed into silence. The sea itself seemed to groan in answer.

…

Meanwhile

Far above, where Pearlbay's dawn light shimmered across the restless waves

Khael froze. His dragon-marked arm trembled, scales flaring with heat as his instincts roared awake.

A voice thundered inside his mind, cold and mechanical, yet urgent:

⚠ WARNING. WARNING.

A SEA MONSTER APPROACHES.

CALAMITY WAVE INCOMING.

Khael's eyes widened.

"What's… going on…?"

The sky darkened as if the sea was breathing against the sun.

..

At the Pearl Guardians' Hall

Elder Neria stood before the ancient altar, her black hair flowing like a stormcloud, her hand pressed against the seal-stone that tied her life to Pearlbay's protection.

Her expression shattered.

"No… Elder Moe… Elder Moe has been defeated. Impossible…"

Her voice trembled for the first time in decades. Elder Moe, the Fisher Man, the last surviving half-blood guardian of the Uska line had fallen.

Her lips curled into a bitter hiss.

"Tsk… Guardians!!"

Captain Roan, battle-scarred and resolute, stepped forward immediately, his men stiffening at his side.

"Yes, ma'am?"

Elder Neria's lavender eyes burned like stormlight.

"Prepare for the wave."

Roan's brow furrowed, his hand tightening around his weapon.

"What?"

But even before she could answer, the ground beneath Pearlbay quaked, and from the horizon came a sound deeper than thunder — the roar of a sea too ancient to be tamed.

Elder Moe lay sprawled on the jagged rocks outside the cave's mouth, his half-fish body heaving, blood spilling from his gills and lips. His breaths rattled, shallow, broken.

"Aurg—" he gagged, crimson splattering the sand. His webbed hands clawed at the ground as though to anchor himself to life.

"Brother Kaen!!" Toren's voice cracked as he and Lys bolted forward, their sandy hair flying in the wind.

"This is the guy—the guy we saw!"

Lys's eyes were wide, trembling as she clutched her brother's sleeve.

"It's him… the Fisher Man from the cave…"

Kiro stood a step behind, pale and stiff, his memories flashing in jagged bursts—the jagged teeth, the stitched skin, the scream that never left him.

He swallowed hard.

"He's… injured…"

Kaen's brows furrowed. He stepped closer, flames flickering faintly in his palm.

"What's going on here?"

Moe's yellow eyes snapped open, blood running down his chin. He looked at Kaen—not at the boy, but through him, into the curse that clung to his veins. His gills flared as he choked out a whisper.

"A cursed child… no…"

Kaen froze, his chest tightening.

(Cursed…? What the hell? How does he know?)

Moe's trembling hand reached out, gripping Kaen's wrist with surprising strength. His voice rasped, each word dripping with urgency.

"Take me… to Neria… now."

Kaen gulped, his throat dry, a shiver running down his spine.

(He knows… something about me. About what I am…)

To be continue