One Piece: The Uchiha Royal Family of Mary Geoise!

Reborn as the nephew of Uchiha Mikoto, Uchiha Xiayin accidentally awakens the Clan System after multiple failed attempts to escape Konoha. But the system's novice task is actually to lead the entire Uchiha clan to the world of One Piece for development? After repeated threats and inducements, Uchiha Xiayin successfully leads the Uchiha clan to abandon Uchiha Itachi and flee to the world of One Piece.

Ding! Congratulations, Host. The novice task has been successfully completed. The system has been successfully activated. The Novice Gift Pack has been sent.

Surrounded by an unfamiliar sea, a trace of ambition gradually appears in Uchiha Xiayin's eyes. Years later, when the Navy, pirates, Revolutionary Army, and countless people frantically contend for the so-called great treasure One Piece. Above the Red Line, at Mary Geoise, pairs of scarlet Mangekyo Sharingan look down upon countless wreckage below. Amid the gazes of his clansmen, Uchiha Xiayin sits on the throne symbolizing the King of the World and coldly declares, "From now on, this world only needs one royal family!" On that day, one after another Uchiha with flashing scarlet Eternal Mangekyo Sharingan activate Complete Body Susanoo, and hundreds-meter-long giant swords cleave apart pirate ship after pirate ship. Kingdoms fall, nobles dissipate, the old era's Navy either submits or vanishes, and any ship daring to fly a pirate flag will be destroyed by fierce fire and the blades of Susanoo. When Uchiha Madara of the Hokage world stands alone looking down at the nine tailed beasts below, when Uzumaki Naruto shouts about so-called bonds and so-called allied forces. Space tears apart, and one after another Uchiha wearing high-collar loose robes of light gray almost white appear in their former homeland. "Long time no see, everyone!"