Naruto: I Became The Hokage At Eight

Kazuku arrived in Konoha in the 10th year of the village's history, becoming a seven-year-old child. No Sharingan, no Byakugan, no Kekkei Genkai, and not from the Ōtsutsuki clan. Just when Kazuku thought he would live an ordinary life here, his father told him they were returning to the village. And then he discovered… The God of Shinobi, Hashirama Senju, was his grandfather. The Professor of Ninjutsu, Tobirama Senju, was his second grandfather. One of the Legendary Sannin, Tsunade, was his biological sister. In the blink of an eye, Kazuku not only became the ultimate "nepo baby" but also awakened a cheat-like ability! So, Kazuku set a small goal: to replace Hiruzen Sarutobi and become the Third Hokage by the age of twenty. To his utter surprise, this small goal was achieved when he was just eight years old!