Traveling through the world of Naruto, Xie Qing found that he had traveled through time in a physical body, without chakra, but with an idle system.
Others rely on blood and ninjutsu to practice, but he relies on idle skills to practice - breathing can become stronger, walking can become stronger, and even kicking his legs can increase the progress bar.
"So others spend money and I spend my life? No, what I spend is my time."
He started to practice ninja skills since he was a baby. When the ninjas of the same period were still learning the Three Body Technique in the ninja school, he was already thinking about how to use his true energy to release ninja techniques.
No chakra? It doesn't matter. There is another force in this world called natural energy. And his system happens to be the only operating system for cultivating immortals in the world.
From the Konoha Orphanage to the top of the ninja world, a time traveler uses the most meticulous method and takes the most stable path.
Hang up for ten years and become an immortal in one day.
But first, you have to graduate from the orphanage alive.
