My System in One Piece Exploded at the Beginning

Traveling to the world of Naruto, he came to the Warring States Period and became one of Uchiha Madara's younger brothers. After years of hard work and layout, we finally reached the Fourth Ninja War and cleared the Naruto World. Just when Uchiha Ken thought he could take a break. System: "It has been detected that the host has stood at the pinnacle of the ninja world. Do you want to open the dimensional wall for time travel?" Uchiha Ken: "System, let's discuss it!" System: "The dimensional wall has been successfully opened. Time travel will begin in ten seconds." Ten, nine, eight... Uchiha Ken: "Ri Lai Lai, did the system hear it? Occasionally Li Lai Lai" ... Two, one As the system countdown ended, Uchiha Ken disappeared with a 'whoosh' sound… This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.