Big brother, I want to become the strongest pirate in the world!

Originally intending to become a Sword Saint, he failed the job change in the Dark Thunder Ruins and became a Berserker. Kazan, a white-haired boy with a ghostly hand suffering from Kazan Syndrome, traversed the world of One Piece from Arad with his sword.
From being all alone to becoming a large family.
Aiming to become the strongest in the world, we head towards Laugh Tale, the end of the Grand Line.
Explore a century of blank history, vie for the position of maritime hegemon, challenge the pinnacle of the old era, and usher in a new era.
This era is called "Monster".
This is the story of a man with conjunctivitis who travels the seas, finding younger brothers and sisters along the way, and leading them to conquer the world.