(The main character is a pirate, a great swordsman, a single female lead, not a harem, and the events before this are unrelated to the main character's group.)

He survived countless extreme battles, slaying all enemies who stood in his way.

His sword-drawing technique was as fast as lightning, shaking the world.

He is the brother Nico Robin tearfully recognized, the nightmare of the Celestial Dragons, the great enemy of the Navy, and a walking, single Yonko.

He is a man who walked out of hell alone from the very beginning of the Great Pirate Era.

Long, flowing hair, black robes, and a free-spirited demeanor.

Everything they do is aimed at overthrowing the tyranny and distorted rule of the world government.

Arthas: "Don't listen to their nonsense. I am a righteous person. Although I have slaughtered many lives, it was all for the benefit of the sea and for the benefit of you."

...

Introduction: Traveling to the world of One Piece, without a system, without a grandfather, without a cheat code, as a pure Yanhuang person from Earth, Mo Ye was almost beaten to death at the beginning. Facing his weak body, Mo Ye said that he just wanted to survive, because only by surviving can there be infinite possibilities.

Minos, who transmigrated to the One Piece world, obtained the Killing System, acquired the Black Dragon King's immense strength and the ability to create the Shadow King clone, and wreaked havoc in the One Piece world, eventually becoming a god.

Transmigrating into the body of a pirate, Wang Chen becomes an apprentice on Whitebeard's ship. The New World is teeming with powerful figures, but he's fearless; he possesses a "jar system." He extracts Conqueror's Haki from Whitebeard. He extracts the Rumble-Rumble Fruit from Aokiji. He extracts the legendary sword, the Second Generation Kitetsu, from Marco. ...Aokiji: It's not a matter of strength; he's a very...special apprentice. Marco: An apprentice? Of course he's Whitebeard's apprentice, except he can easily defeat an Admiral! Shanks: An apprentice? An apprentice who can make me flee in terror, don't I, Shanks, have any dignity? Blackbeard: You...you stay away!! ...As an apprentice, he becomes the king of the New World, starting with slapping Shanks and chasing Blackbeard!

[No system + Mythical beasts, vampire fruit + Great swordsman + Three colors of domineering + N heroines + Daily life + lsp]

As a time traveler, Carl D. Sephiroth obtained the vampire fruit at the wrong time and in the wrong place...

He just wants to live a comfortable and wonderful life in this chaotic and disordered world of One Piece.

position?

Justice and evil?

The winner is the king and the loser is the bandit!

Justice and evil, that is something that only the victors are qualified to decide...

Of course, as a hero, he doesn't mind being the winner!

Pirate Queen Boa Hancock: "Sephiroth, as long as you want, I can do anything for you!"

Kozuki Hiyori: "For the sake of our master's cause, Brother Momonosuke, please die!"

Admiral Sengoku: "I have never been able to figure out whether Sephiroth is a righteous man or not..."

The leader of the revolutionary army, Drago: "Comrade, can you help me revise the revolutionary program..."

The commander-in-chief of the World Government's armed forces, Sora Cyborg: "This guy Sephiroth... is such a headache!"

As a college student, staying up late is inevitable. Unfortunately, after Luo Lin stayed up late to catch up with the latest episode of One Piece, he

When he woke up, he traveled through time and space and came to the world of pirates. He turned into a 6-year-old child and drifted on the sea for a long time!

By chance, he met Robin who was crying secretly at the beach, and the two of them got to know each other.

Seeing that Lorraine was about to starve to death, Robin gave Lorraine one of his two pieces of black bread a day.

Seeing Robin being bullied by the little brats in the village, he couldn't help but stand up for her, but was beaten up by a group of little brats!

…

From then on, Lorraine was determined to become a strong man, not for anything else, just to protect Robin!

Proficient in six styles and skilled in three colors of Haki, Lorraine relies on his own perseverance to reach the top of the pirate world!

Aokiji looked at him with new eyes, Whitebeard praised him highly, and even the Five Elders said he was a strong man.

However, behind her back, she was often dragged to cook by Robin by the ears.

Qin Tian traveled to the pirate world and obtained the Possession Teacher System, allowing him to possess the opposite sex and share their bodies. He possessed eight-year-old Nico Robin and raised a Thousand-Armed Ice Queen, who protected O'Hara! He possessed twelve-year-old Hancock and raised a Flame Dragon Princess, wielding dragon-slaying magic! He possessed ten-year-old Nami and raised a Weather Goddess, who presided over the Brilliant Sky Thunder Prison! ... After Qin Tian had trained ten qualified apprentices, he was finally able to reshape his physical body. Standing at the entrance to the Grand Line, Qin Tian declared to the world: "I will destroy Marijoa and reshape this world!" Thousand-Armed Ice Queen Robin: "I will freeze the entire world for you, Master!" Flame Dragon Princess Hancock: "I will burn everything for you, Master!" Weather Goddess Nami: "I will thunder with my might for you, Master!" Ocean Ruler Shirahoshi: "I will flood the Red Earth Continent for you, Master!" ... (This story and characters are purely fictional. Any similarities are purely coincidental. Please do not imitate.)

Gu Luo unexpectedly transmigrated into the world of One Piece and became Luffy's twin sister, Monkey D. Luo.

He was completely dumbfounded at the moment of birth. How could he, a handsome and dashing man, turn into a little girl?

Years later, the world has undergone earth-shattering changes. Ryo becomes the Fleet Admiral of the Marines, Luffy becomes the Pirate King, and Dragon is the leader of the Revolutionary Army.

Blackbeard: "The whole world is taken over by that family, what are we supposed to do?"

Kaido, with tears in his eyes, said: "We're all just tools to help them ascend the throne!"

Buggy the Clown: "I would call Rosa a god, and as for Luffy, get out of here, he's not worthy to be Rosa's brother!"

This era will be rewritten by the Monkey D family!

One day, Luffy said to Ace, "Let's stick to our own way. I'll call you 'brother,' and you'll call me 'brother.'"

Join the crew and witness the world of One Piece together with the Straw Hat Pirates.

Martial arts expert Lin Ning's soul transmigrates to an unfamiliar ocean world, becoming a young man from the East China Sea.

Relying on his martial arts will from his previous life, he awakened Conqueror's Haki upon waking.

He learned Conqueror's Haki Entanglement, encountered Luffy who had just set sail, and joined the Straw Hat Pirates.

He combined his past life's martial arts to create a body-forging method, and worked hard to improve alongside Luffy, Zoro, and others.

While cultivating their skills and exploring the truth of this world, they embark on unknown adventures with new companions.

As the sea breeze rises, their legendary journey begins!

[Navy] + [Slightly Abusive Protagonist] + [Justice] + [Transformation Novel]

The girl, who had endured many hardships, became a member of the navy, and sang her own song of justice.

Smoker: As a student of Professor Zeff in the same year, I am ashamed of myself. Am I the mad dog or is she the mad dog?

Akainu: I greatly admire Erza's sense of justice. All evil pirates should be eliminated!

Sengoku Marshal: Erza, can't you obey orders? Sometimes this world isn't just about passion; there's also human relationships involved. Hey, don't give me that pitiful look as if I'm bullying you.

Hawkeye: I never imagined a girl could reach this level in swordsmanship. Erza, you are a worthy opponent.

Wang Luffy: Everyone run! If the opponent is Erza, we'll really be killed!

Erza: My justice is the sword in my hand. Pirates, you can't escape! Hahahaha!

What kind of storm will a powerful navy that hates pirates to the point of madness stir up in this world?

The protagonist is relatively weak in the early stages, but very brave, so he is often beaten up. There is no system, so he may be almost killed many times. The protagonist has two personalities: combat and social. If you don't like this, please do not read.