Leon, the legendary godfather of the American Underworld, unexpectedly transmigrates to the world of pirates and becomes a slave up for auction, about to be bought by the Celestial Dragons!
(Note: The protagonist has never watched Pirate King and knows nothing about its plot.)
At that moment, the [Mafia Godfather System] awakens! Build a family, defeat powerful enemies, and expand your territory to gain unlimited stat points and skyrocket in strength!
"Ding! Defeat Crocodile and receive max-level Armament Haki!"
"Ding! Slaughter Dressrosa and receive the Ancient Weapon 'Pluton'!"
"Ding! Slap the Five Elders and receive mastery of the Three Types of Haki + an immortal body!"
From that day on, a family that played by no one's rules emerged on the seas!
Don't like it? I'll beat you until you do!
Resist? I'll wipe out your whole family!
During the Paramount War, Whitebeard and the Marines fought until heaven and earth were plunged into darkness.
I led twelve gold-medal godfathers down from the sky, stomped Akainu's Magma Fist to pieces, and pinned him firmly beneath my foot!
"Marineford is mine to command today. Anyone who dares to stop me will be killed without mercy!"
The Marines' Fleet Admiral Sengoku trembled all over. "This man... He's not a pirate at all! He's a devil from hell!"
The World Government was completely stunned.
They discovered that from Marine Admirals to CP9, from the Shichibukai to the Revolutionary Army, and even among the Celestial Dragons, I had my people everywhere!
Years later, as I sat on the Empty Throne in Mary Geoise and looked down upon the entire sea, I spoke slowly:
"You used to make the rules. Now, I am the rules."
So it's original? If you write a One Piece book without having read One Piece, you act as if you are the original author.