People Practice Breathing in Konoha

When I traveled to the world of Naruto and became an unknown and insignificant passerby, how could I survive in this world with a very high mortality rate? What kind of power would be gained from the breathing technique that was used as a health supplement in my previous life? What kind of efforts did I make to integrate into the world of Naruto and make my name resounding in the ninja world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.