The world of Naruto is a hopeless world. Even the protagonist is a chess piece that has nothing to do with victory or defeat, let alone ordinary time travellers.
Uchiha Yuu just wanted to eat something good, drink something good, and watch the sunset and moonrise with the kitten.
By the way, become an immortal and beat the chess players to death.
I'm not bothering you, so why are you having trouble with me?
————
Uchiha Yuu does not practice magic, he practices Taoism and nature.
What is Tao following nature?
Yuu's answer is simple: suck in the natural energy, it will hurt and it will feel good.

我，宇智波悠，一心修仙

I, Yu Uchiha, am devoted to cultivating immortality

iyuuchihaamdevotedtocultivatingimmortality我，宇智波悠，一心修仙

Time travel, great. Can live one more time
The Aburame family is great. It's easier to get along than civilians, and safer than red and white eyes.
My parents are all here, no problem, I'm not the protagonist.
Of course you should enjoy your new life, and if you want to pursue it, set a small goal: I heard that there are immortal species of wisdom here.
But life is so fragile, and there are so many threats: war, Kyuubi, Nagato, Obito, Madara, Black Zetsu, and a lot of Otsutsuki.
Phew, Otsutsuki is amazing.
One day, my insect swarm will be able to cover the sky and the sun, transcend the ninja world, and trillions of insects will set foot on the sea of ​​stars and defeat Otsutsuki.
Until then, I will whisper: I am the swarm of insects!

在木叶打造虫群科技树

Create a swarm technology tree in Konoha

createaswarmtechnologytreeinkonoha在木叶打造虫群科技树

Series of 百战羊