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!

[Boat travel + multiple female leads + action + comedy + Momonosuke and the deserter king are destined to die]

After Etherius Thor Dragneel learned Dragon Slayer Magic, he unexpectedly ended up in Windmill Village in the East Blue, where he became sworn brothers with Luffy, Ace, and Sabo. However, he ultimately chose to set sail with Luffy and began his adventure to become the strongest person in the world.

Nami: I love Thor the most!

Robin: What a bad guy!

Hancock: This is the legendary wedding!

[No system] [Single female lead or no female lead] [White Crew] [Life Fruit] [Great swordsman] [Dual Devil Fruit] [Strategic alliance] (The Rumble-Rumble Fruit is given to the Navy; please do not read if you dislike this.)

Shako, a seasoned office worker, accidentally died from electrocution while slacking off at work and watching One Piece. His soul was transported to the One Piece world and he was rescued by Whitebeard. He eventually recognized the pirate as his father, changed his name to Shako, and became Edward Newgate's eldest son and the vice-captain of the Whitebeard Pirates.

Shaq: "Hahaha, that old devil Im's era was called Whitebeard!"

Whitebeard: "Gurarararararar, what do I, an old man in my seventies or eighties, know? If you have something to say, go talk to my good-for-nothing son."

Decades after Whitebeard reigned supreme over the seas, people were astonished to discover that this old man showed no signs of aging. Even more terrifying was that if anyone coveted his throne, they would be met with devastating attacks and the whispers of a demon.

"Hahaha, what kind of Tom, Dick, or Harry dares to disrespect my old man?!" (The synopsis is insufficient; please proceed to the main text.)

Gu Changtian accidentally travels to the world of One Piece and is bound to the One-Punch Man Summoning System. In the One Piece world, he establishes the First Legion and continuously accumulates shock points.

Such a terrifying demon has crossed over into the world of One Piece. What will become of the One Piece world...?

"The Warring States period was terrifying; the First Legion members were all like monsters..."

Whitebeard: "Giants are the strongest men in the world..."

Redhead: "Oh no, my pride isn't working anymore..."

Garp: "Even my iron fist can't beat the First Legion..."

Kizaru: "No matter how much money you offer me, I won't fight the First Army..."

"Is there something wrong with the story of an ordinary person like me being reborn as a character in One Piece, only to be born on a ship and shipwrecked, ending up on Elbaf Island?" "What?! I transmigrated too early!?" — (Multiple female leads, no system, single world, multiple transmigrations)

My name is Bai Ye. I run a small stall in Windmill Village and work part-time as a dimensional intermediary.

One day, the naval hero Garp complained that my senbei was awful and tried to overturn my stall.

I threw him into the otherworld instance!

[Ding! Client selected: Monkey D. Garp!]

[Dungeon generating... Dungeon World: Naruto!]

[Mission Objective: Survive the Third Raikage's offensive, or defeat him!]

Garp: "You brat! What kind of hell have you brought me to?!"

Me: (Legged back) "A VR experience for one million Berries, what a steal!"

[Ding! Dungeon cleared! Clearance rating: S+!]

[Congratulations on obtaining the SSS-rank reward: The Perfect Jinchuriki of the Eight-Tails!]

[Congratulations on obtaining the S-rank reward: Lightning Release Chakra Mode!]

Feeling the surging lightning and tailed beast chakra within my body, I laughed out loud.

Who should be thrown in next? Whitebeard? Or one of the Five Elders?

(No way, letting others fight to the death while I get the rewards? This system is too awesome!)

Link, transported to the world of One Piece, brought Doraemon's magic pocket with him. He happened to run into Luffy, who was still using the Gum-Gum Fruit and hadn't yet awakened his true power as the Mythical Zoan type, Sun King form. So, I'll follow this future Pirate King, the liberation warrior Joy Boy, the future Sun King, and experience the magnificent world of One Piece together! During their journey, various gadgets in Link's hands will demonstrate their powerful effects! Luffy, did you know the Gum-Gum Fruit has another name? Hawkeye, you're the world's strongest swordsman? How about the [Famous Sword - Lightning Bolt]? Kaido, you have the strongest Zoan-type army? I have some delicious [Momotaro Rice Balls] here, you can try them! Im, you want to destroy the world? Here's the [Earth Destruction Bullet], do you want it...?

When Kaido merged with the soul of an unlucky transmigrator, he learned that the world he was in was a manga, and that he was merely a stepping stone for Luffy, the so-called chosen one of destiny, to defeat him.

"What kind of bullshit is Wang Luffy, Chosen One, Joy Boy? I'm going to smash you all to pieces..."

'Ding, system loading...'

Kaido: "So this is the cheat code of that unfortunate transmigrator? It seems that after merging with that guy's memories, I not only know the direction of the plot, but I also have a cheat code to use..."

'Ding, system loading complete. You are not the host of this system. The system will automatically unbind you. Goodbye...'

Kaido: "Damn it..."

(Cheerful, cold-blooded, ruthless, bloodthirsty, ambitious. Kaido is the Kaido from the original work, but one who knows the plot; his personality won't change much.) (Completed novel: "One Piece, Me, Marco, Starting with the Marineford War")

The protagonist, Dicas, is transported to the world of One Piece and becomes a stray cat. Just when he is lamenting the tragedy and helplessness of life, the strongest cat god system descends. Watch how the protagonist improves his strength, how he uses the system to summon cats from the anime in his memories, and how he leads them to make a name for themselves in the sea world and make a name for their cat clan.

Rainbow Cat: "Let me, Rainbow Cat, the greatest swordsman of the cat clan, learn about the swordsmanship of this world."

Doraemon: "Rainbow Cat, wait a minute, let me get out the Lightning Ball to help you."

Dorami: "Wait a minute, brother, watch me use the shock gun in my left hand and the air cannon in my right to help you."

Meow: "I can do anything except catch Pikachu."

Talking Tom: "Me too. I'm invincible except for catching Jerry."

Star Cat: "Come and experience the charm of martial arts, magic, and wisdom. Here I come."

Abu: "Let's forget about the above. How about I show our enemies what the combination of technology and strength really means?"

Stingy Cat: "Come and experience the power of this Cat King's Explosive Red Fang."

Black Cat Sheriff: "I bet your bullets won't curve."

Blue Cat: "Hehe, do you know why I'm the leader of the Dragon Riders?"

Gatomon: "Let me destroy you in the name of the angels."

Tomorrow's Bright Moon: "We, the cat clan, will remove all obstacles."

Xiaoqing: "Let me tell you what it means to overcome strength with softness?"

Sugar: "Do you know what it means to break through force with speed? It's simple, just let me eat my fill of fish balls."

Whirlwind Claw: "I am the number one constable in the world."

The world of One Piece is silent and shocked.