Luo An was reborn in the world of One Piece, born with the Haki of Armament, and was also bound to a divine doctor system.

The medical skills are divided into ordinary, profound, top, master, extraordinary, and god-level.

After each treatment, in addition to the experience points, a medical skill blind box that only Luo An can see will be randomly dropped.

Trauma treatment encyclopedia, golden wound medicine, scalpel, encyclopedia of medicinal materials…

…

Whitebeard: “Luo An, that guy, can actually heal my body, but there is no ship that can carry me in this era.”

Red Hair: “I bet this arm on the new world… But Luo An not only cured me, but also gave me a unicorn arm!”

He traveled to the world of One Piece and merged with the world's strongest creature to become the new Four Emperors: Kaido, the King of Beasts.

Logically speaking, this is an absolutely high-end time travel, invincible from the start!!!

But when he thought that he had come to the world of One Piece, and as the villain, he was about to face the unreasonable Child of Destiny, Master Joyboy, the user of the Nika Fruit, and the only designated savior: the Sun God.

Kaido felt as if he was invincible.

Sit-ups, version update, and martial spirit awakening!

Is he destined to follow Kaido's old path and become a stepping stone for Luffy to become the emperor?!

Fortunately, you are the child of destiny, and I am a time traveler.

If you have Nika, I can cultivate immortality.

Watch how I, the new Kaido, cultivate my immortality and defeat Nika, and restore order to the pirate world!!!

[No system][Pure pirate power system][Many women][Happy fruit][The man who scares Im]

After traveling to the pirate world, you still think about just lying down and living your life. Can you have some ambition?!

Adolf D. York, a time traveler without a system, obtained the Superman Happy Fruit by making a wish.

"I have only two biggest wishes in this life!"

"First, wake up and take power over the world!"

"The second one, drunkenly lying on the lap of a beauty!"

“Whether I can do it or not is not known yet, but I will definitely do it!”

"As for dying, I deserve it. I don't have the ability to do that!"

"And the first step to realize my dream! I choose to join the Rocks Pirates to learn advanced experience!"

………………

Many years later.

Adolf D. York sits on the high throne of the Holy Land of Mary Geoise.

Standing around him were countless beauties in maid outfits, including Im, Nami, Robin, and the Empress, and in front of him were reporters from all over the world.

Facing the camera, he said: "Everyone must have dreams. What if they really come true? I am the best example!"

With admirals everywhere and pirate emperors as insignificant as dogs, Lin Yi suddenly transmigrates to the world of One Piece and obtains the 'Super Auction House' system. Possessing this system, Lin Yi begins his legendary journey. Here, you will encounter countless items from other worlds and gain opportunities to change your destiny. And Lin Yi, with the system, will drink the strongest liquor and woo the most beautiful women. He will roam the world freely, manipulating all beings. Watch as Lin Yi stirs up the pirate world with his auction house.

After traveling through the pirate world and becoming a prisoner in Impel Down, Wayne lives a life worse than death every day. Fortunately, Wayne has the Ten Thousand Worlds Commission System.

You can get various rewards by completing the commission.

[Commissioned Order: The Pirate King's Last Wish - Help Roger take care of Lu Jiu until Ace is safely born.]

Rewards: 1. Roger's power (current state); 2. Roger's domineering aura (peak)

[Commission Order: Make Trouble in Marijoa - Protect the World Government for Shiki the Golden Lion, and attack Marijoa]

Reward: Floating Fruit (Awakening)

After inheriting Roger's legacy and Ski's Float-Float Fruit, Wayne discovered that he was terrifyingly strong.

He beat Mary Geoise and became the worst criminal in history in the eyes of the World Government!

But in addition to this, Wayne has multiple vests.

He is the founder of Candy Baby magazine, runs the World Beauty Pageant, and is the man behind all the Miss Worlds;

He is one of the Seven Warlords of the Sea. The arms company he founded single-handedly sparked the world arms race, earning him the nickname the Arms King.

He is the leader of the Chaos Ladder organization that the World Government fears. Barrett, Crocodile, and Red Earl are all the Apocalypse Knights under his command.

He is Kaido's partner and Big Mom's guest;

He is...

Wayne has many titles, but in the end, people call him the King of the World!

Luen journeyed through the pirate world, gaining access to the most powerful stat system, allowing him to plunder other people's stats. Looking at the golden stats on the Deserter King Coby, Luen exclaimed, "You clown, you deserve it? Take it!" Then, Luen plundered even more powerful stats. Marine Headquarters: "He is a monster capable of devouring and robbing everything, the most vicious esper in history. Without permission from the highest levels of the World Government, you must not engage him! The world's most dangerous man! 'King', Luen! Live or die! Bounty: 3.9889 billion berries!"

Ryan, who survives by petty theft after transmigrating to the world of One Piece, looks at the Devil Fruit he just stole and says:

He who steals a hook is executed; he who steals a country becomes a prince… he who steals heaven and earth becomes a saint!

From now on, please call me the Demon Lord of the Heavenly Thief!

[At the age of eighteen, just debuted as a pirate, you met the current overlord of the sea in the pirate world, Rocks D. Zibek. Now what you have to do is to find a way to survive in his hands. 】

After traveling back to the pirate world for seventy years, the great pirate Monger, who was ready to retire, looked at his system that was seventy years late.

And the intern in front of him who just turned twenty, hasn't even learned how to be domineering yet, and is working diligently on his own ship.

Reach out your hand.

Bang!

"Captain, what are you doing!?"

"Nothing, I just want to beat you up."

[Ding~, congratulations on defeating the overlord of the sea, Rocks D. Gibeck! 】

...

This book is also known as - "As a Pirate, You Get Younger and Younger"

"How Can You Lose When All the Crew Are Royal-Class? 》

Become...

All Things of this World, Turn to Ashes, Flowing Blade-like Flame!

Crossing over to the world of pirates(the one piece world) , in the era of pirates, the Roja from eleven years ago obtained a Sword Soul system that lets him strengthen infinitely and extract various kinds of skills.

Flowing Blade-like Flame (Ryūjin Jakka) , Mirror Flower, Water Moon (Kyoka Suigetsu), Moon Fang Heaven-Piercer (Getsuga Tensho), Thousand Cherry Blossoms (Senbonzakura)……

“If this sword descend, you may be roasted to death.” Roja looked at Akainu in front of him and seriously said.

[Sniper][Great Swordsman][Demon Sword][Mythical Beast Species Garuda Fruit][Hot-blooded][Decisive Killer][Pervert][Independent Storyline Original Plot][Currently: Kalifa, Alpha, Empress, Lady Shirley, etc...]

The West Sea is a sea area ruled by gangs, but it also has countless powerful pirates.

Ever since Andy got the bounty point system, the guys with bounties in this sea area became his targets!

Ghost Assassin Moon, Enchantress Luna Meiyan, Bonebreaker Bruno, Flame Fist Royce, Mad Axe Tobias, these long-famous pirates in the West Sea have all been defeated by Andy!

But this is just the beginning!

Killing pirates was no longer enough for Andy, so he teamed up with the richest man in the ocean and began to offer rewards to the navy and the Celestial Dragons. Thus, the terrifying God Killer was born!

Besides killing, the protagonist also has some tenderness, is passionate, and may also do some treacherous things...

If there are any bad parts in the writing, please tell me in the comment section. I can see it in the background and make reasonable changes.

P.S.: There's no justice in this book. Regardless of whether they're pirates or navy, they're all treated as pirates. As long as there's a bounty, the protagonist will kill them all, pirates or navy alike. Anyone who provokes him will be killed! It doesn't matter if the other party is guilty or not! If you mind... forget it, mind it!