After his defeat on Onigashima, Kaido, submerged in the seabed's lava, opened his eyes and was reborn in 1484, serving as a trainee on Rocks' ship. The God Valley Incident was about to unfold! "One bad thing after another. If defeat by Joyboy is fate, then I will tear it apart!" Kaido picked up the Eight Saber Rings, and with a wielding of his Domineering Haki, he blasted the mountain to smithereens. A Devil Fruit awakened? Enveloped in Domineering Haki, he could see and kill! Only Haki could forever stand at the top of the world! In this age of brilliant heroes and powerful warriors, Kaido must rely on his own strength to challenge Roger and Whitebeard and make up for the regrets of his past life!

The mystery of the sea is that you won't be surprised by anything that happens. The property of Buggy the Clown, the treasure of Crooked... Luffy was bored and found a pendant in there, and then he heard a voice in his ear. "What is your dream?" Luffy answered without hesitation: "I want to be the man who becomes the Pirate King!" The starting point of the nightmare. The Pirate King training plan begins! Learn and train with Zoro, learn sniping with Usopp, and learn knowledge with Nami? ... Fruit development proficiency +1 Observation Haki proficiency +1 Armament Haki proficiency +1 Conqueror Haki proficiency +1... Becoming the Pirate King starts with only one hour of sleep a day. During the Battle of Marineford, Akainu looked at the boy who mastered the three colors of Haki falling from the sky and roared angrily: "This boy must not be sent back to the New World!"

[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...

Traveled through time.

Takro looked at his reflection in the water: a spiky head, a ten-year-old body, and a dangling tail...

Got it! A true Saiyan start!

With the system in hand, the world is mine!

Becoming stronger? Super Saiyan? Bulma on the left and Chi-Chi on the right? It's just around the corner!

However...

"Haki is also qi! I've practiced correctly!"

"Although I can transform when I see a full moon, I'm not a fur tribe!"

"What is ONE PIECE? What is One Piece? Where are my Dragon Balls?!"

......

Day 1 of the journey: The Dragon Ball world is too dangerous! Stay safe and develop!

Traveling through time: Huh? It seems just like that?

After traveling through time for N years: What kind of bugs are the Celestial Dragons? This is my Earth!