Naruto: I, an Uchiha, Become Hashirama Senju's Disciple

Uchiha Lin Hai, a transmigrator carrying the memories of a forty-year-old man, opens his eyes to find himself the young master of the Uchiha Clan, and the very grandson of the legendary Madara Uchiha! A hellish start? The entire clan is under round-the-clock surveillance by Second Hokage Tobirama Senju, and could face annihilation at any moment? No need to panic! With an adult's mind and a max-level talent for ninjutsu, Lin Hai can fire off two B-rank techniques in a single minute at just six years old, instantly catching the attention of the Konoha High Command! Tobirama Senju: “This boy's talent is terrifying. He acts like an even stronger Madara. We absolutely cannot let him live. He must be eliminated as soon as possible!” Hashirama Senju: “Tobirama, shut up! This child possesses the true Will of Fire. He's the hope of Konoha's future, and I'm going to take him as my personal disciple!” When Madara Uchiha's own grandson becomes the personal disciple of the God of Shinobi, Hashirama Senju, the entire shinobi world trembles. Years later, when the Great Ninja War breaks out, Lin Hai stands atop the battlefield, Susanoo in his left hand and Senjutsu Chakra in his right... “Second Hokage, you were right about me back then. I'm not only an upgraded Madara, I'm also an upgraded First Hokage!”