Luffy Twin Brother: The Monkey King

Kong was finally released from the whirlpool's pull—only to be launched helplessly through the water.

For a terrifying moment, he lost all sense of direction. Up, down, left, right—nothing made sense. His body tumbled uncontrollably, the vast ocean swallowing him whole.

Desperate to reorient himself, he let a small bubble escape his lips. It drifted left.

"…Up is left?" Kong's head throbbed just trying to comprehend that.

Still, it gave him what he needed. He twisted his body, adjusting his position, and after what felt like forever, he finally floated upward until his head broke the surface of the sea.

'Now what?' His eyes darted around, scanning the endless horizon. No land. No ships. Just water.

He sighed. Great. With no other choice, he let the waves carry him, knowing that fighting against them would just waste energy. Then, as if fate had heard his suffering—his stomach growled.

"I'm hungry," Kong whined, stomach twisting in agony. He had already gone through enough today—now he had to starve on top of it? Tears almost welled up in his eyes.

But just as quickly as the despair came, it vanished. Because up ahead… A ship. Kong's eyes widened. It wasn't some grand pirate vessel—it looked more like a simple fishing boat. But right now? That was exactly what he needed. Food.

Kong called out for help, his voice carrying across the open sea. It didn't take long for the fisherman aboard the ship to notice him. The man quickly moved over, reaching down and pulling Kong onto the deck.

Kong coughed, shaking off the seawater before looking up gratefully. "Thanks… I got sucked into a whirlpool. Thought I was gonna be stuck drifting for days."

The fisherman waved him off with a chuckle. "You must be new to the sea. It's impossible to be lost for that long without seeing an island or two. There are trillions of islands out there." 

Kong froze. Trillions? 

"That's hard to believe," Kong muttered, still trying to wrap his head around the scale of this world.

Back on Earth, some countries were massive, but Dawn Island alone was bigger than most of them. If a single island here was that large, then what about the rest of the world?

A trillion islands?

Did that mean there were trillions of different nations, cultures, and people? Earth barely had over 200 countries. Even if some islands were bigger than others, the sheer number was mind-blowing.

"What were you doing at sea in the first place?" the fisherman asked, snapping Kong out of his thoughts.

Kong shook off the shock and straightened up. "Oh, right! I'm Monkey D. Kong!" He stood tall, placing a hand on his chest with a confident grin. "Today, I set off to find the One Piece and become the Pirate King!"

The fisherman let out a deep sigh. "My son set off to sea not too long ago, chasing after the One Piece too… Ever since Gold Roger made that speech, all you hot-headed youngsters just can't sit still."

"So, old man, do you know where I can get a ship? Oh, and by the way, what's this island called?"

The fisherman gave him a knowing look. "This is Shimotsuki Island."

"As for a ship…" The fisherman glanced over Kong's soaked clothes and empty hands. "You don't look like you have money on you."

Kong hummed, thinking for a moment. Fair point. He hadn't exactly planned to get separated from Luffy this early.

"You have a point. I guess I can put my goal of becoming the Pirate King on hold. Instead, I should become a bounty hunter," Kong said lightly. 

A bounty hunter was someone who hunted criminals, primarily pirates, to claim the rewards placed on their heads. It wasn't the most glamorous path, but it was a solid way to make money—and right now, he needed a ship.

As soon as he set foot on Shimotsuki Island, he had the fisherman guide him around, searching for a place where he could find all the wanted posters of local pirates and criminals.

Eventually, he came across a place where he could not only see the wanted posters but also get information on the targets.

Kong scanned the posters, flipping through stacks of them.

"So low," he muttered, unimpressed by the numbers.

As he kept reading, something caught his eye. Several of the information on the posters had North, East, South, and West blue on them.

"We're in the East Blue—it's known as the weakest sea," the fisherman explained. "The average bounty here is around 3 million beli, and a bounty of 10 million is considered impressive. Meanwhile, the truly powerful pirates have bounties in the billions."

Kong nodded in understanding. So, East Blue was basically the shallow end of the pool.

"A second-hand ship costs about 100 million beli… To make things easier, should I go to the strongest or second strongest sea?" Kong asked lightly, weighing his options.

"The strongest sea is considered to be the east blue," the fisherman corrected. "But that's ignoring the other three seas."

Kong frowned. "Other three?"

"What do you think splits these seas?" the fisherman asked. "There are three main things you should know if you want to survive out there."

Kong stayed silent, listening carefully. He might have been strong, but strength alone wouldn't be enough, understanding the world itself was just as important.

And so, the fisherman explained. First, there was something called the Grand Line.

It was a massive sea route that circumnavigated the world, unlike any other. Normal compasses didn't work there, making navigation nearly impossible without specialized tools.

This was the sea every pirate dreamed of reaching, the ultimate path to adventure. Most of the greatest stories, battles, and legends were born there. But what truly made the Grand Line special was what lay at its end.

The greatest treasure in the world, One Piece.

Left behind by the legendary Pirate King, Gold Roger, it was said to rest on the final island of the Grand Line. And every pirate in the world was chasing after it.

The fisherman continued his explanation, giving Kong a much deeper understanding of the world's structure.

First, there was the Grand Line, but it wasn't just one endless sea—it was divided into two halves by the Red Line.

The first half was known as Paradise—a chaotic, unpredictable ocean filled with danger. But compared to the second half, it was considered easy.

The second half was called the New World—a lawless, far deadlier place ruled unofficially by the Four Emperors, the most powerful pirates in existence.

The second major obstacle was the Calm Belt. The Calm Belt surrounded both sides of the Grand Line. There were no winds, no sea currents, making it nearly impossible to sail through. Worse, it was the nesting ground for the Sea Kings, massive sea monsters capable of swallowing entire ships whole.

Finally, there was the Red Line. The only continent in the world, it ran across the planet, splitting the oceans in half and dividing them into four smaller seas—East Blue, South Blue, North Blue, and West Blue.

The Red Line was also the main barrier to entering the Grand Line. Outside of the highly dangerous Calm Belt, it was the only way in or out. It was also the one thing separating the first half of the Grand Line from the New World.

"So, you're telling me to go to the Grand Line and challenge an Emperor?" Kong asked, nodding as if it were a simple task. How tough could an Emperor really be?

The fisherman nearly choked. "Those words never left my mouth!" he yelled, raising a hand like he was about to smack some sense into Kong—only to stop himself at the last second.