My Shadow Monarch's System - Chapter 18: Regret.

Doomsday was approaching…

As the future High-Ranking among Elven, I was meant to be dignified and holy—but my friends never gave me the chance. One is a human prodigy turned “cripple” after an accident, determined to prove everyone wrong. Another is the Demon King, whose idea of preparing for war involves turning his entire race into farmers. As I watch my friends stir chaos in their own ways, I can’t help but wonder—how did I end up in the middle of all this?

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates

A huge guy is bawling his eyes out. In this day and age? Sure, maybe the world changed while I was away in that other place. I’m not some old-fashioned boomer.But what if that guy is clinging to my pant leg, sobbing and sniffling—And we’re not even acquaintances?Even in modern times, that’s just messed up. Ask any passing kid, they’d agree.So yeah, I shook my leg. He was gross and too close.“The hell’s wrong with you? Crying just ’cause you saw a ghost?” “N-no! I swear, it was really there! You didn’t see it!!”I let the disrespect slide. Barely. He was asking for help and still talking down to me just because I look young?Obviously, I’m not the one who lost his balls. He is.And yet… when I looked where he pointed—Something was there.I threw some coarse salt and looked again.He stared at me like I was insane, but I ignored it.…Yeah. Something was definitely there.It made eye contact.