After reading the last page of Naruto, Sato Tetsu traveled to the night of the Nine-Tails in Konoha 48 years.
He does not have heaven-defying blood, nor the arrogance of omniscience and omnipotence. He only has regrets about his entire youth, and a system that can train the basics to the extreme.
He doesn't want to be a hero who subverts the ninja world, nor does he want to steal Nazuo's halo as the protagonist.
I just want to use my own hands to protect those who deserve to live.
Let Jiraiya not have to sink his body into the deep sea, let Ningci not have to break his sword on the battlefield of the ninja world, let the Uchiha children not have to cry on the night of genocide, and let those ordinary ninjas not have to become nameless cannon fodder in the war.
When the Fourth Ninja War came to an end and everyone respected him as the Ninja Grandmaster, Sato Toru just smiled and clenched the forehead protector in his hand.
His way of ninja has always been simple: practice the basics to the extreme and protect the people around you who you want to protect.