One Piece: My Crew is from Other World

East Blue – Shimotsuki Village

The calm waters near Shimotsuki Village rippled as a large pirate ship approached the coast. Its crimson sails fluttered in the wind, bearing the unmistakable Jolly Roger of the Red-Haired Pirates.

These were no ordinary pirates.

They were the crew led by one of the Four Emperors of the sea—Shanks.

"Captain, is this really the island the Dragon Hunter Pirates mentioned?" Carlos stood beside the railing, peering at the peaceful village in the distance. "They said it holds some kind of strange power?"

He furrowed his brows. "But this is the East Blue… There are probably eight hundred islands like this out here. Maybe more."

Carlos had spent the last few months obsessively studying the corpses of Sea Kings found near Mount Golber, hoping to uncover the source of a terrifying mutation. But no matter how much he dissected and analyzed, he found nothing of value.

Just as he was about to give up, a message arrived from the Dragon Hunter Pirates.

And it changed everything.

Shanks stood calmly at the bow, the sea breeze gently brushing through his red hair. "Carlos," he said, "you know as well as I do—Ryuunosuke and his crew have no reason to lie to us."

"There's no gain in it for them. Especially not now."

Carlos crossed his arms, still unconvinced. "Then why didn't they study this power themselves? Why hand it over to us? Come on, Shanks—you understand how important this kind of thing is."

The rest of the crew looked toward their captain, waiting for his response. Even Monk, a normally quiet crew member, stepped forward.

"If I had something like that," Monk muttered, "I wouldn't give it to anyone. Not even my own mother."

The small monkey on his shoulder screeched in agreement, beating its little chest.

Shanks let out a chuckle before taking a sip from his hip flask. "Ryuunosuke doesn't want us involved in the war he's about to wage against the World Government. This… is his way of tying our hands."

He paused, eyes drifting toward the New World.

"He knows that if we come here to investigate, we'll be too busy—too invested—to interfere."

Silence fell over the ship.

They had planned to wait for the right moment, to involve themselves in the war brewing beneath the surface. Play both sides. But now, with the mystery in Shimotsuki Village tugging at their curiosity, their options had changed.

"Do the Dragon Hunter Pirates really think that far ahead…?" Carlos muttered under his breath.

Just then, a raspy voice interrupted the quiet.

"So even the Four Emperors are drawn to this little village now, huh?"

Everyone turned sharply.

An old fisherman stood calmly at the edge of the dock, rod in hand, a basket of freshly caught fish beside him. No one had sensed him approach—not even Shanks.

The red-haired emperor narrowed his eyes. This guy… he's not normal.

There was no hostile intent. No surge of haki. But something about him felt powerful—not in the way of strength or battle—but like the quiet pull of history itself.

"Who are you?" Shanks asked.

The old man didn't flinch. He looked at the sword hanging from Shanks' waist and smiled.

"That blade… it's called Ace, right?"

Shanks blinked. "Yeah."

"That sword was forged by a dear friend of mine. It ended up with Roger… and now it's with you."

He looked up, eyes twinkling with nostalgia. "Forgive my manners. The name's Shimotsuki Kozaburo. I was once a blacksmith. A damn good one, if I may say so."

Shanks' eyes widened slightly. "Shimotsuki Kozaburo... The blacksmith from Wano who forged Enma?"

Kozaburo chuckled. "That's the one. You've got a good memory."

Shanks remembered it clearly. The day Roger dueled Kozuki Oden, when Oden was sent flying by a simple blow—but Enma, Oden's sword, still left a slash that cracked the sky. He'd never forgotten the name of the man who forged that blade.

"What brings you here, Emperor?" Kozaburo asked, his tone casual despite who he was speaking to.

"We're not here to fight," Shanks replied honestly. "I came to speak with someone. A man named Shimotsuki Koshiro."

Kozaburo raised an eyebrow. "Koshiro's my son."

He leaned back on a wooden stool and gestured lazily toward the village. "If you're not here to cause trouble, go ahead. I've got fish to catch and not enough daylight left."

"Thank you," Shanks said, bowing respectfully.

With that, the Red-Haired Pirates disembarked and made their way into the heart of Shimotsuki Village.

They didn't have to search long.

Outside the familiar building of the Isshin Dojo, a man dressed in a clean gi stood waiting. He bowed politely. "Everyone, this way please. The teacher is expecting you."

They followed him inside. The dojo had already been prepared—tea poured, cushions arranged.

Koshiro sat calmly at the head of the room.

"You're here about the Infinity Stones, aren't you?" he asked without preamble.

Shanks frowned. "Infinity Stones? That's… the first I've heard of that name."

He looked at his crew—everyone else seemed just as puzzled.

Koshiro didn't speak. Instead, he pulled out a long sword, its hilt wrapped in black cloth, the blade glowing faintly with a pulse-like rhythm.

"Feel the aura," he said, handing it to Shanks.

The moment his fingers closed around the hilt, Shanks' face changed.

This… this feeling…

A memory flashed in his mind—that day on the East Blue when he lost his arm. That monstrous aura from beneath the waves. Even his Armament Haki hadn't protected him. It had felt like this.

He returned the sword, eyes serious. "Please, Koshiro. What is that? What's the truth behind it?"

Koshiro placed the sword down gently. "What you felt is the influence of an Infinity Stone. One of six remnants from a world long forgotten—each of them capable of warping the laws of nature. Time. Space. Power. Reality. Soul. Mind."

He looked at them calmly. "This one is the Stone of Mutation. It awakens what's dormant. In beasts. In people."

Shanks' expression darkened. So this was what mutated the Sea Kings… This power, if left unchecked, could shake the balance of the world.

Meanwhile, in the Kingdom of Akoslan, Yahiko stood by the harbor, overlooking dozens of ships preparing to sail.

"I see," he said quietly, lowering the Den Den Mushi. "The captain says we don't need to worry about the Red-Haired Pirates."

He turned, eyes cold and focused. "Prepare to set sail. We're heading for the New World."

Similar scenes played out across the seas. Hundreds of pirate ships stirred from slumber, sails raised, compasses set.

All under the same flag.

The Dragon Hunter Pirates.

The most feared force on the sea—finally on the move.

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