One Piece: My Crew is from Other World

After hearing Ryuunosuke's words, Buggy finally stopped fiddling with the items in his hands and walked over.

"This is…?"

Buggy's eyes widened as he read the map Ryuunosuke handed him. His usual goofy expression was replaced by rare seriousness.

"So it's true... this treasure map actually contains something valuable. This is intel about the King, right? No wonder it felt important. Damn, this is practically a national treasure."

Buggy exhaled slowly, awe written all over his face. Then he shook his head.

"Alright, I'm backing out. I'm not touching anything that's connected to the World Government. Count me out."

His eyes drifted to the corner of the room.

"But that coffin over there… it's weird."

He walked over, giving it a cautious glance.

"I mean, look at it. Whether it's the materials or construction... I can't even lift it!"

Buggy scratched the back of his head, visibly embarrassed.

Ryuunosuke's gaze followed his. That coffin had been in plain view the whole time, and from the outside, it looked completely empty—no treasure, no corpse, nothing. Yet, Buggy, a man who had at least some mastery over Armament Haki, couldn't even budge it?

That alone was enough to ring alarm bells.

Ryuunosuke stepped forward and grabbed the edge of the coffin. Immediately, a dense, unnatural weight surged through his arm.

"…No wonder."

It wasn't just heavy—it felt anchored to the earth, as if chained by some unseen force.

Just then, a soft voice chimed in behind him.

"Captain, let me try."

It was Rem. Though she looked delicate, Ryuunosuke knew better than to judge her by appearances.

He gave her a nod and stepped back. He could've forced it open himself, but since she offered, he was curious to see what she could do.

Rem walked up, her fingers lightly brushing the coffin's surface. As she did, a black aura began to seep from her skin.

Ryuunosuke's eyes narrowed.

"Ghost energy…?"

It wasn't like the kind Zoro used in his Asura form. No, this was different—deeper. It was a demonic racial ability, not just a product of harsh training.

A low, eerie rustling echoed through the room.

Rustle… rustle…

Black tendrils slithered out from beneath the coffin, spreading like ink across the stone floor. Yet, oddly enough, the moment they neared any person, they veered off, deliberately avoiding contact.

Suddenly, from the front of the coffin, a cat-like head popped out.

"…What the hell?"

The once-inanimate coffin had transformed into something alive.

Its main body was still the coffin, but writhing tentacles acted like limbs, and its feline head twitched with unnatural life. It was grotesque and surreal—like something straight out of folklore.

Even for someone as unshakable as Ryuunosuke, this thing gave off serious mythological vibes.

Rem calmly stepped forward.

"This is a Hell-Sucking Cat," she explained. "A rare spectral creature from my world."

Her eyes narrowed, puzzled.

"But why is it here? This isn't my world…"

Ryuunosuke glanced at her.

"Does it have any special abilities?"

Rem nodded, her tone more serious now.

"It's used to preserve corpses—or living beings. As long as it's fed properly, it can keep the body in a state identical to the moment it was sealed inside."

"So it's like… biological stasis?" he muttered, thinking back to the intel Rocks had left behind. Could the one sealed inside be... the Heavenly King?

But the coffin was so small…

No. That didn't make sense. The Heavenly King was the strongest of the Three Kings. Even if he wasn't as massive as Pluton or Poseidon, he wouldn't be the size of a human.

Ryuunosuke shook his head, dismissing the thought—for now.

"Buggy," he said, pointing toward the ground. A fresh hole had opened up beneath where the Hell-Sucking Cat had been. "If you're thinking of keeping it, you'd better check that first."

Buggy peeked inside and nearly choked.

A massive underground chamber stretched beneath them, filled with hundreds of Sea King corpses—piled high, rotting and radiating decay.

"Gulp..."

Buggy swallowed hard.

Yeah, no way was he feeding that thing. Not even if he sold the Grand Line.

Rem spoke again, calmly.

"If it's not fed, it just goes dormant. You can store it and use it when necessary. But beware: if you use it on someone living, the nutrition supply must never stop. Once it's interrupted... it'll consume the person inside."

Buggy went pale.

"Thanks, but I think I'll pass. I'd rather die gloriously in an explosion than get munched on by a demonic coffin."

He turned to Ryuunosuke and gave a small bow—rare for him.

"You and your Dragon Hunter Pirates can keep this thing. We didn't find much in this expedition… but still, thanks. I mean it."

Ryuunosuke raised an eyebrow.

"Is this about Roger?"

Buggy hesitated, then nodded slightly.

"No need to thank me," Ryuunosuke said softly. "He was my brother's father. I would've done it anyway."

He turned and began to walk away.

"I'll leave your ship to you. I've got something else to handle."

With that, he vanished—taking the Hell-Sucking Cat with him.

One by one, the other Dragon Hunter crew members also disappeared into the shadows.

Soon, only the Buggy Pirates were left in the chamber.

"Oi! At least take us with you!" Buggy yelled, chasing after them.

BOOM!

A thunderous shockwave rocked the area.

Buggy froze. That pressure… it was unmistakable.

A storm of violent energy swept through the cave, followed by a deep, terrifying roar.

Then, from the skies above, a massive shadow loomed.

A giant Eastern-style dragon soared above them, its scales shimmering with power and its very presence suffocating.

Buggy's jaw dropped.

"That's… Kaido?! The Beast King Kaido!?"

Panic spread across the crew.

No intel had warned them of this. Why was a Yonko showing up now?

Kaido hovered in the sky, releasing a kingly aura that silenced the earth itself.

Down below, Ryuunosuke stood calmly, unfazed.

He extended his black wings and took to the air, rising to meet the dragon.

"Kaido?" Ryuunosuke called out with a smirk. "What brings you here? Sightseeing?"

Kaido's eyes narrowed. His bloodlust was tangible.

This wasn't a social visit.

"You…" Kaido growled, voice echoing like thunder. "You bullied Linlin?"

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