Ninja in Action

Yin is a time-traveler, but he does not have the other predecessors of time-travelers, those golden fingers that make a roaring sound and strike the sky, the ground, and the air. After finally surviving the Second Ninja War, Gin was desperate when facing the Third Ninja War. Fortunately, the teacher application he submitted was approved by the Hokage and he became a glorious ninja school teacher. From then on, Yin began to teach and educate people, leading a mediocre life... It's strange. As a time traveler, if you don't pretend to be cool, what's the difference between him and a salted fish who hasn't traveled through time?