He traveled through time and became the cousin of Nara Shikamaru of the Nara clan in Naruto. Nara Shikahaku has a deductive transformation system. He said that although his chakra attributes are not enough and he does not have a special bloodline limit, he has a family secret technique.

What? You're saying the shadow isn't that long? The blood vessels in the human body are about 100,000 kilometers long. So, it's scientific that my shadow would become thinner and longer from the Fire Nation to the Water Nation, right?

Killing from a distance? Doesn't Shadow Seam allow you to concentrate chakra and thrust to kill? What? How do you break through the Lightning Release Chakra Coat? Doesn't Shadow Slap Technique increase strength?

How do you control the tailed beasts? Isn't the most basic shadow imitation technique enough? It's common sense that shadow imitation can freeze the body, right?

How can I defend against the Tailed Beast Balls alone? Gaara can use sand to defend himself, and the Raikage can also use chakra cloaks. Isn't it reasonable that my shadow can transform into a barrier?

Don’t disbelieve me, this is really a secret technique passed down from my family.

"Kushina, after my death, please erase all traces of me from the outside world. Only my disappearance can save the family!"

"Tsunade, I'm going on a long journey. Don't worry, this is not a farewell forever. We will meet again one day!"

"Huuye, use me as nourishment for the sacred tree and eat me!"

…

He traveled through the world of Naruto and became an Uchiha. In order to survive the upcoming night of genocide, he used the life simulator to save his regrets and improve his own strength. However, he did not expect that one day he would be visited by the real masters.

"You're a big liar! You said you'd be back soon, but I've been looking for you for over 20 years!"