I'm in the Ninja World, My Undercover Sign-In System!

Travel through the world of Naruto and get the undercover sign-in system. Uchiha Flame gained the trust of Sarutobi Hiruzen, went undercover in Konoha, signed in, and obtained the Mumu Fruit. Gain Orochimaru's trust, go undercover in the Sound Ninja Village, sign in, and obtain the magic of talking. Obtained the trust of Uchiha Obito, went undercover in the Akatsuki organization, signed in, and obtained the Rokuku Immortal Thief. Cloud Hidden Village, Mist Hidden Village, Sand Hidden Village... Sarutobi Hiruzen: "Uchiha Flame is a trustworthy subordinate!" Uchiha Obito: "Uchiha Flame is my right-hand man!" Craftsman Ninja Village: "Lord Uchiha Flame is our hope for the recovery of Craftsman Ninja Village!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.