I became Garp's twin brother

Traveling to the world of One Piece, Kadi found himself the twin brother of the naval hero Garp. Moreover, he is a great pirate who is imprisoned in a large underwater prison and is even more terrifying than Roger! In this way, the awakened Kadi directly bulldozed the underwater prison and regained his freedom. From then on, there was another big pirate in the sea who was more terrifying than the Four Emperors. But he is also the brother of a naval hero!