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Slime in the Multiverse

Samorash
49
chs / week
The average realized release rate over the past 30 days is 49 chs / week.
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Synopsis
Reincarnated as a powerful slime, Rimuru Tempest thought his journey had reached its peak. But fate has other plans. Dragged into a mysterious cosmic force, Rimuru finds himself crossing into entirely new worlds — each more dangerous and unfamiliar than the last. First, he awakens in the lawless seas of One Piece, where pirate kings battle for supremacy. Then, he's pulled into the hidden magical halls of Harry Potter, where dark secrets stir. And when he's thrust into the chaos-ridden dimension of Honkai Impact, Rimuru must face threats beyond imagination. Each world brings new allies, unexpected enemies, and choices that could alter the fate of the multiverse itself. Pirates. Wizards. Herrschers. And many more worlds await. The multiverse has opened. Rimuru’s true adventure begins now.
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Chapter 1 - Chapter 1: Arrival in a New World

"Is this the new world?"

On a remote island, a rift suddenly tore open in the air, as though space itself had been sliced apart. From that rupture emerged a slender, delicate figure.

"What world is this, I wonder? There's no one around to ask."

Rimuru stretched his neck and looked around. Aside from the barren island beneath his feet, there was nothing but the vast, endless sea stretching to the horizon.

"Oh well. Ranga!"

No sooner had he spoken than a massive Tempest Wolf, as large as an elephant, burst forth from Rimuru's shadow with a mighty roar.

"My Lord, have you summoned me for something? Or is there an enemy nearby?"

The massive wolf stood before Rimuru, speaking in a deep, respectful tone. He also gave Rimuru a big, wet lick with his tongue.

"Nothing urgent, I just wanted to be with you!"

Rimuru chuckled and waved his hand dismissively.

Ranga—his trusted friend, loyal subordinate, and ride. His favorite thing in the world? Licking Rimuru… yes, literally licking him, like a kid with an ice cream cone.

With a light push of his feet, Rimuru jumped onto Ranga's back.

"Let's just pick a direction and go. We'll figure things out when we meet someone."

"Yes, my Lord!"

Ranga responded and darted forward, sprinting across the surface of the sea at a speed so fast that an ordinary person couldn't even track his silhouette—only the white spray of waves left in his wake.

 

My name is Rimuru Tempest.

I may look like a little girl, but I'm actually a lovable slime. And though I happen to also be a Demon Lord, I'd say I'm a pretty good slime overall… probably?

I used to be a human—a completely average high school student living a completely average life.

Then, for some unknown reason, I was reincarnated into the world of That Time I Got Reincarnated as a Slime, became the "Moe King," and even received a really unique system. Why is it unique? Because it only exists to let me have fun.

No missions, no objectives—just a lottery system. I drew tons of interesting stuff from it. The most notable was something called the "Dimensional Guild." It lets me recruit people from other worlds, install abilities, and more. The guild now includes features like lotteries, power enhancements, and virtual battle arenas.

So… is my system the lottery itself? Or is it the Dimensional Guild?

Anyway, my journey has diverged a lot from the original story. For example, I saved the ogres, and Miss Grace survived thanks to a healing item I pulled from the lottery. Plus, I'm way stronger than Rimuru in the source material. Honestly, in a one-on-one fight, I'm practically invincible.

Because of that, my nation developed far more smoothly. I easily gained recognition from the other Demon Lords and even became close friends with a few of them. I dragged them into the Dimensional Guild too. At this point, the Guild basically runs that world.

But now… all the Demon Lords have become addicted to gaming. Even Veldora spends his days partying up with Milim, Ramiris, and the others just to play games.

They dumped all the government duties on me. Even with Wisdom King Raphael, I nearly worked myself to death. How dare they treat a poor slime like this?

Finally, yesterday, the world had mostly stabilized. Only minor affairs were left, so I handed those off to Violet and the others, opened a dimensional gate, and set off for another world—ready for some real vacation time.

 

Several hours later...

"My Lord, there's a ship ahead," Ranga alerted, his eyes fixed on the horizon.

Rimuru yawned and rubbed his sleepy eyes. "A whale? A whale-shaped ship?"

"Wait… whale… whale ship!"

Suddenly, Rimuru's eyes snapped open. As a die-hard fan of Whitebeard, he immediately recognized it—the Moby Dick, Whitebeard's legendary ship!

So this is the One Piece world?

If I'm here, how can I not meet the strongest man in this world? I've always respected Whitebeard!

"Ranga, get us closer. I want to meet the strongest, most honorable man in this world."

Rimuru spoke with excitement.

"Yes, my Lord."

Ranga surged forward, charging toward the Moby Dick at incredible speed.

 

Meanwhile, aboard the Moby Dick, a towering, muscular man sat upon a throne fit for a giant, gazing out at the sea.

"What an interesting guest. Sons! Prepare to welcome our visitor!"

His deep, booming voice echoed through every corner of the ship.