Signed for Twelve Years, Killed Uchiha at the Beginning

Traveled to the world of Naruto and became Uchiha Shisui's younger brother, Uchiha Kei Awakened the god-level exclusive sign-in system. As long as you sign in with the Uchiha family, you can get rich rewards. "Ding! After five years of signing up, I contracted with the Phoenix Clan." "Ding! Accumulate signing in for ten years, and you will be rewarded with the Mangekyō Sharingan." "Ding! I have signed in for twelve years and will be rewarded with the Blood Successor Limit Wood Escape..." I originally thought that as long as I kept going like this, I would become a being like the Sage of Six Paths. But Uchiha Kai discovered that the Uchiha clan was about to be exterminated. How could this be possible? It's okay if you die, but you can't stop me from signing in again! Therefore, in order to continue to receive sign-in rewards, in order to become the Six Paths Sage in the future. Uchiha Kai embarked on the road to save the Uchiha clan. First! He was about to kill Uchiha Itachi who betrayed the family... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.