One Piece: With Sign-in System

On Fish-Man Island.

As the Traveler passed through the double-layered bubble surrounding Fish-Man Island, the ship was immediately detected by the Sea King Army stationed to guard the island.

The unauthorized vessel appeared in a coral harbor, drawing the attention of both the New Fish-Man Pirates and the Sea King Army, led by the three princes.

Several high-ranking officers of the New Fish-Man Pirates, mounted atop massive sea beasts, stood on the shore, their eyes locked on the ship.

Under the orders of their captain, Hody Jones, the Fish-Man Pirates sought to bolster their ranks by recruiting human pirates. Any ship illegally entering Fish-Man Island was promptly intercepted by these officers for evaluation or conscription.

"Ham-ham! These people don't seem like pirates," Hammond, one of the officers, tilted his head, his tone laced with curiosity.

A drunken Fish-Man, Dosun, lazily sipped his drink, squinting at the ship. "What? Not a pirate ship…?"

"Too soon to say," replied Dosun, arms crossed as he scrutinized the ship. "There've been cases of human pirates hiding their identities before."

Overhead, three royal princes—Fukaboshi, Ryuboshi, and Manboshi—guided the Sea King Army on a flying fish ship toward the scene.

"Is it a pirate ship illegally trespassing?" Fukaboshi asked, his gaze fixed on the vessel approaching the harbor.

"Doesn't seem like it. I don't see any pirate markings," Manboshi responded.

As they watched, a group of individuals stepped out of the cabin and onto the deck.

"Wow! Look at that—there's even clouds and a sky here!" Conis exclaimed in awe, pointing upward, her face lit with joy.

"What kind of structure is this?" Robin, in a pale blue hoodie and black pants, pushed her sunglasses onto her forehead, studying the artificial sky with fascination.

Bonney, with her pink hair, heart-shaped lipstick, and denim shorts, scanned the surroundings, her expression eager. "I wonder what kind of food they have here on Fish-Man Island."

"Are there any strong fighters here?" Enzo asked, eyes gleaming with anticipation.

"Before all that…"

Kuina's sharp, steady gaze swept across the area. Her steel bracers glinted as her hands rested near the twin swords at her waist. Dressed in a white martial arts uniform, her blue ponytail swayed as she spoke. "Shouldn't we assess our current situation first?"

"Looks like we've been caught for trespassing," a calm voice sounded behind the women.

Under the watchful eyes of the New Fish-Man Pirate officers and the three princes, a black-haired youth emerged from the cabin. His black martial arts outfit was plain, and a black sword hung at his waist. With his eyes closed, he stepped onto the deck.

The moment the New Fish-Man Pirates' officers—Dosun, Zeo, and Hammond—saw his face, they froze. Their eyes widened, mouths agape, as fear and disbelief overtook their expressions.

"Th-that guy is…?!"

"Could it really be him?"

"What is he doing here?"

Fukaboshi, unaware of their panic, turned to the newcomers. "Humans, who are you? Are you pirates?"

"Don't worry. We're not pirates and mean no harm to Fish-Man Island. We're just travelers passing through and stopped here along the way," Ron replied, his tone calm and steady.

"Is that so…" Fukaboshi hesitated, observing the group. They didn't look like pirates—a seemingly blind young man, several women, and a Dugong. They didn't appear dangerous.

"For safety's sake, we'll need you to register your names," Fukaboshi said after a moment, nodding to Ryuboshi, who retrieved a ledger. "Once you've registered, you're free to explore Fish-Man Island. Just make sure to leave through the designated exit when you depart."

Ron nodded lightly. "Understood."

As Robin reached out to take the ledger, Dosun's panicked voice rang out.

"Prince Fukaboshi, you can't let them onto Fish-Man Island! That guy—that guy is more dangerous than any pirate!"

Fukaboshi froze, his eyes narrowing. "More dangerous than pirates? What do you mean?"

Ryuboshi scratched his head, confused. "Ham-ham. Dangerous? Why?"

Hammond raised his gun, aiming it at the ship. "Your Highnesses, it's no wonder you don't recognize him. But you surely know his name. That's the Traveler Ron—the one responsible for the Northern Seas Incident!"

Fukaboshi's eyes widened in alarm. Gripping his trident tightly, he and the Sea King Army immediately assumed a defensive stance.

"The Traveler? Are you truly that Ron?" he demanded, his voice sharp.

The blindfolded youth on the deck chuckled softly. "I didn't expect my reputation to reach ten thousand meters below the surface."

Fukaboshi's expression darkened at Ron's nonchalant response.

"Captain, what's the plan? Should we take them out?" Bonney asked, cracking her knuckles.

Kuina's hand rested on the hilt of her blade, her expression calm yet ready for action.

Enzo clenched his fists, his excitement barely contained.

In that instant, a powerful aura radiated from the group, thickening the air around them.

Both the Sea King Army and the New Fish-Man Pirates froze as the oppressive presence bore down on them, even the massive sea beasts trembling under the pressure.

A calm and steady voice broke the tense atmosphere like a ripple over still water.

"We have no ill intent toward Fishman Island. Please… don't force our hand."

Despite the peaceful tone of the black-haired boy's words, free of any trace of killing intent, a chilling sensation ran down the spines of everyone present—Fukaboshi, the New Fishman Pirates, and even their sea beasts. Cold sweat drenched their bodies as a profound fear gripped their hearts.

It felt as if any rash movement on their part would declare war against this group.

And their outcome would be the same—death.

When Ron led his crew off the ship, passing by the cadres of the New Fishman Pirates and their sea beasts, none of the pirates dared to even twitch, their muscles frozen in place.

"Captain, are you sure it's okay to leave the ship here?" Bonney asked, glancing at Ron as they walked.

"It's fine," Ron replied calmly.

"True enough," Conis chimed in with a cheerful grin. "With the laser shield activated, it's not like anyone can just break in."

"That's not quite what I meant," Ron added, a faint smile tugging at his lips.

Bonney tilted her head in confusion. "Then what do you mean?"

"If there's any issue with the ship… I'll simply take the entire island with us."

"Well, that doesn't sound too bad either," Bonney chuckled.

The New Fishman Pirates and the three princes stood frozen in disbelief, listening to the fading conversation. Their faces paled as if all blood had drained away.

For anyone else to claim they could take an entire island was absurd—a madman's fantasy.

But for this young man, rumored to be a master of the Float-Float Fruit's powers, it wasn't just possible; it was terrifyingly plausible.

If he unleashed his ability, could the entire Fishman Island actually rise to the surface—or worse, ascend into the sky?

Fukaboshi, deep in thought, suddenly trembled as if struck by a revelation. His eyes widened in alarm.

"Brother?" Ryuboshi asked, noticing the change in Fukaboshi's expression. "What's wrong?"

Without answering, Fukaboshi turned to the royal guards and issued a sharp order. "All of you stay here and protect this ship. No one—no one—is allowed to go near it!"

The guards snapped to attention, nervous but obedient. "Y-yes, sir!"

Turning to his younger brothers, Fukaboshi explained hastily, "I need to go to Father immediately." With that, he sprinted toward Ryugu Palace without further explanation, leaving a confused Ryuboshi and Manboshi behind.

The New Fishman Pirates, meanwhile, hurriedly mounted their sea beasts and retreated to Fishman Street. They needed to report this to their captain, Hody Jones, immediately.

…

Elsewhere.

[Ding! Detected host's location: Fishman Island. Conditions for sign-in fulfilled. Proceed with sign-in?]

The system's voice echoed in Ron's mind.

"Sign in," Ron responded.

[Sign-in successful. Rewards obtained: Vitality +10. Special Observation Haki Trait—Ability to Hear the Voice of All Things.]

A peculiar sensation coursed through Ron's body. Instinctively, he expanded his Observation Haki to its maximum range, encompassing all of Fishman Island and the surrounding deep sea.

Strange voices reached him from the abyss. They weren't human sounds but ethereal waves of communication that he could now understand.

"How much longer until the appointed day…?"

"Soon, very soon…"

"Has our Mermaid Princess awakened her powers yet…?"

These were the voices of the massive Sea Kings.

They were waiting for their king.

The "appointed day"—what did it signify? Was it connected to Noah, the colossal ship?

As Ron pondered these thoughts, someone gently tugged on his sleeve.

"Captain, food~!" Bonney's playful voice broke through his musings. "Let's have takoyaki today, okay?"

"I don't mind," Ron replied casually, pulling his focus back to the present as he reined in his expanded Observation Haki.

After all, maintaining such a wide range of Haki consumed mental energy, and with the constant drain caused by his sealed Tenseigan eyes, every moment was taxing on both his stamina and focus.

Because of this, Ron estimated that his overall strength was slightly diminished compared to when he fought that yellow monkey on Drum Island.

Bonney glanced at Robin, Conis, and Kuina for their opinions, and seeing their agreement, the group decided unanimously. Together, they stepped into a takoyaki shop run by fishmen.

Settling into their seats, the group waited as the enticing aroma of takoyaki filled the air.

As Ron idly sat, his gaze drifted to the system's attribute panel, where he noticed something surprising—his Observation Haki had unknowingly advanced to Level 6.

"Is this because of the 'Voice of All Things' trait?" he wondered.

At Level 6, Ron surmised he was only one step away from achieving what Rayleigh had described as the third stage of Observation Haki: the ability to glimpse fragments of the future.

His Armament Haki, similarly at Level 6, seemed close to the same milestone. If it advanced to Level 7, he would likely reach the third stage of Armament Haki—the mastery of Flowing Sakura, where energy flows freely beyond the body to devastating effect.

"Every three levels mark a distinct phase," Ron thought as he studied his attribute panel. "Does that mean the pinnacle of mastery is Level 10?"

Techniques like Shave, Moonwalk, and Tempest Kick had all reached Level 10 long ago, beyond which no further improvement seemed possible no matter how much he trained.

It stood to reason that the three Haki types—Observation, Armament, and Conqueror's Haki—might share the same limit. Rayleigh had spoken of a mysterious fourth stage for each of them, a realm that likely corresponded to Level 10.

Of course, this was merely Ron's speculation for now, and he couldn't confirm its accuracy just yet.

His fingers tapped lightly on the table as he mulled over these thoughts. Progressing further in Haki wasn't just a matter of hard work—it required insights, battles, and a deeper understanding of one's willpower.

Lost in his musings, Ron barely noticed when the server brought over their freshly made takoyaki. The sizzling sound and savory aroma broke his concentration, and he smiled faintly.

"Well, let's eat," he said, his tone relaxed as he picked up a skewer.

Bonney wasted no time, grabbing one as well, her expression lighting up with glee at the sight of the piping hot snacks.

"Finally!" she exclaimed, biting into the crispy, golden-brown takoyaki. "This is the best part of the day."

Robin chuckled softly, while Kuina and Conis joined in, each savoring the delicious treat.

Despite the casual atmosphere, Ron's mind was already strategizing, thinking of what lay ahead. His growth, his crew, and the challenges awaiting them—none of it could be taken lightly.

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