One Piece: sign-in to Ryujin Jakka

The Marine Commodore returned to the warship's control room and immediately contacted his superior through the ship's fixed Den Den Mushi.

Meanwhile, Roman stood silently between the two warships.

He didn't seem to care at all about the shocked gazes directed at him from all directions. With a calm and gentle smile on his face, he looked like a kind and approachable man.

But that was precisely what shocked everyone the most.

Someone who looked so warm and mild-mannered… had actually killed a pirate with a bounty over one billion like it was nothing.

No one had seen that coming!

The Marines didn't waste time.

After the Marine Commodore's report passed through several levels, the news quickly reached Fleet Admiral Sengoku himself.

At this moment, Sengoku had just settled into his new position of Fleet Admiral. This event was Sengoku's first major operation since taking office. As the saying goes—a new official sets three fires. His first "fire" was to showcase the Marines' power to the seas!

Recently, the Navy had been suffering embarrassment after embarrassment—from that mysterious man who intercepted operations, destroyed a Buster Call fleet with a single slash, and even caused chaos in Mary Geoise.

One scandal after another left the MAriens humiliated.

People were beginning to think the Marines were all bark and no bite.

To restore the Marines' reputation, Sengoku organized this promotion tournament.

As long as one was strong enough—even a mere recruit could be promoted directly to Admiral!

When Sengoku learned that among the severed heads submitted by this mysterious man was that of Every, a pirate with a billion-berry bounty, even he was shocked.

Back when Sengoku was still an Admiral, he had once pursued Every personally. He knew just how terrifying that man's brute strength and cunning nature were.

Without overwhelming power or an airtight strategy, defeating him was impossible.

Now, Sengoku found himself intrigued.

And so, he approved Roman's participation in the tournament—using those heads as an "entry fee."

A few minutes later, the Marine commodore reappeared before Roman and spoke with newfound respect.

"Fleet Admiral Sengoku has approved your participation. Please board the ship. We need to register your information."

His entire demeanor had changed.

Gone was the arrogance and scorn. All that remained was respect and fear.

After all, the Fleet Admiral had contacted him personally via the Den Den Mushi—what clearer sign could there be?

The Marine commandore was sweating nervously, especially when he recalled his earlier attitude. But Roman, from start to finish, hadn't even paid him any attention.

After finishing the registration, Roman stepped aboard the Marines warship and set foot on the holy land of the Marines—Marineford!

Just then, a mechanical voice echoed in his mind.

[Ding! Congratulations, host, for successfully checking in. You've obtained: Peak Mastery of the Six Styles (Rokushiki)!]

[The Six Styles includes: Soru (Shave), Tekkai (Iron Body), Kami-e (Paper Art), Geppo (Moonwalk), Rankyaku (Tempest Kick), and Shigan (Finger Pistol). This martial arts system structure pushes to surpass the limits of the human body and grants immense power!]

Roman smiled faintly.

That simple smile caused several nearby female soldiers to feel their hearts skip a beat.

"Wow… he's so handsome!"

"Never seen that face before... is he new?"

"And he looks so gentle…"

He ignored their murmuring and followed the officer to his temporary residence.

Later that day.

"Sir, the promotion tournament begins tomorrow. The matches will also be held then. Please stay here for tonight. Depending on your promotion outcome, a more suitable room will be arranged."

After saying his piece, the Marine Commodore bowed and left, leaving Roman alone in the room.

Now alone, Roman walked to the window.

In the distance, a towering building stood in the center of Marineford.

'That must be Sengoku's office,' Roman thought to himself. 'Maybe I can sign in there later and get some extra rewards…'

At the same time, Sengoku was reviewing the details Roman had submitted.

He had claimed to be from Vermillion Island—the same island that had been slaughtered by the Golden Lion, Shiki.

Since Roman had been traveling at the time, he wasn't present during the massacre. Afterward, he developed an intense hatred for pirates and sought to join the Marines.

Now, Vermillion was nothing more than a ruined memory—there were no survivors, no witnesses. Roman could say whatever he wanted.

And given how many pirates he had already killed, Sengoku didn't doubt him.

In fact, he looked forward to the surprises this man might bring.

Of course, it goes without saying, Sengoku had his own plans for him.

As dusk settled over Marineford…

Roman, feeling a little bored, decided to take a walk.

The atmosphere here was unlike anything on the open seas. It felt a lot more intense.

Before he knew it, he found himself near a secluded training ground.

Unlike the crowded facilities used by the regular soldiers, this one had only a few people training.

What caught his eye was a tall blonde woman—easily over 175 cm.

Wearing glasses and a focused expression, she was practicing the Six Styles(Rokushiki) with graceful practiced precision.

With his current mastery, Roman could immediately tell what level she was at.

Sensing his gaze, the woman suddenly turned toward him.

"You rude man—where's your uniform? Why are you walking around Marineford like that?!"

She strode toward him confidently, adjusting her glasses as she spoke.

The moment Roman heard those five words, a realization struck him.

'So it's her…'

No doubt about it—this was none other than Kalifa, a future agent of the CP9.

The woman infamous for her catchphrases: "You rude man" and "That's harassment!"

"I just arrived today to participate in the promotion tournament," Roman said calmly.

Kalifa raised an eyebrow.

"The promotion tournament isn't open to outsiders. So that means… you're lying!"

Without warning, she struck.

A long leg, clad in a five-centimeter high heel, shot toward Roman in a fierce kick.

Roman's mouth twitched.

'I just looked at you because you seemed familiar. Why are you trying to kick me out of nowhere?!'

With a smooth motion, he extended his hand, catching her ankle effortlessly.

Kalifa's face turned red.

"H-Hey! Let go of me! That's harassment!"

Roman shrugged. "As you wish."

And with that—