Naruto: the Orphan of the Whirlpool, Sealing All Regrets

[Hokage, system, the male protagonist specializes in sealing skills, and saves Mito at the beginning] Traveling through Naruto, Uzumaki Saiya became the only orphan who survived the day when the country was destroyed. The clan elder used his life to seal the general outline of the sealing technique "Sealing the Tent" into his bloodline. Sealing objects, sealing people, sealing power, sealing souls... Can seal tailed beasts, but also save those who don't deserve to die. When his great-aunt Mito Uzumaki was about to die, he took his last breath to make up for his regrets; when White Fang committed suicide, he dispelled the rumors in advance; during the Nine-Tails Rebellion, he sealed the tailed beast with his backhand; when the Uchiha clan was annihilated, he stood on the night of the genocide and broke Danzo's swords one by one. "It's none of my business." He said this, his hands never stopping. The entire ninja world regarded him as the most cowardly loser. His legs became weak when he saw the Kage level and he could run faster than anyone else. It wasn't until Kaguya Otsutsuki came that people were shocked to realize that he had saved all the regrets that should have happened!