Born as twins, separated by a mere few seconds.
His older brother, Hyuga Rinji, became a lofty young master of the main family, while Hyuga Gen became a branch-family servant whose life and death lay in others' hands!
At three, the Caged Bird Seal was carved into him. At six, his own brother made him suffer the torment of his brain being crushed, day after day, by activating the Cursed Seal, all because Hinata Hyuga paid Rinji no attention.
"Little brother, remember your place. The branch family will always be the main family's dogs!"
In the grip of rage, the [Gate of Traversal] roared open in Hyuga Gen's mind!
From the start, he broke free of the Caged Bird Seal, a thousand-year-old shackle, and stepped into the world of One Piece, onto a sky island ten thousand meters above the sea. He even got his hands on the strongest natural-type Devil Fruit, the Rumble-Rumble Fruit, for free!
That night, Hyuga Rinji once again pushed open the door with a cruel grin and formed the hand sign to activate the Caged Bird Seal.
But what awaited him was no longer a desperate plea for mercy. It was an iron fist wrapped in thunderbolts of immense power!
He dragged Rinji to the sky island, crushed all four of his limbs, and gouged out the main family's Byakugan!
When the Gate of Traversal devoured the Byakugan, Hyuga Gen gazed at the Hyuga Clan Compound in Konoha and smiled bloodthirstily:
"So devouring a clan member's Byakugan lets me evolve! Then every single member of the Hyuga Clan is just an experience pack to help me ascend to the Tenseigan!"
So far it looks good, I hope the author will update it more.
I don't know whether the protagonist will switch from civet cat to prince at the beginning, or whether he will kill all the enemies at the beginning and then teleport and run around to play jungle on the edge. It would be more interesting if the protagonist knew how to release the caged bird
Pay attention to it first and then take a look.