In Uchiha, Control Saitama's Training Method!

Nan Xi traveled to Uchiha and was judged to be a loser who would never be able to activate the Sharingan for the rest of his life. Three years later, it will be the night when the filial son Itachi will be exterminated! I thought I could only survive, but I activated Saitama's training method and insisted on training to become infinitely stronger! Fake ninja: engages in sneak attacks, flashy ninjutsu, high attack and low defense. The real ninja: a humanoid ferocious beast, the body becomes a saint, destroying everything! Kyuubi: Compared to Nan Xi, Madara is nothing. He just kicked me to the left and I sent him! Madara: Young people do not respect martial ethics and bully my ninety-year-old comrade. Is this good? This is not good! As Nan Xi becomes more and more invincible, something is gradually wrong with the female characters. Hinata: Nanxi is so... So powerful, it's going to break~ Tsunade: Slug, help me push, I'm almost out of strength~! Mei Terumi: Minami is so angry that when I'm with him, I can't help but magnify the waterfall technique every time! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.