Human life is not worth mentioning in the face of human nature. People will do whatever it takes to save their lives. This is human nature. Naruto looked at the sticky blood on his hands, and the last important person fell into his arms. The Hokage's clothes were stained red by that person...
Even though he was Hokage, he still couldn't save the sleeping person in his arms.
There is a ninja technique that was opened by the man in his arms, and his purpose is to let the seventh generation Hokage go back to the past to find the lost things again.
Let Naruto, who has experienced many vicissitudes at the age of thirty, return to his childhood. Can everything that can be undone really come back?