Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10 Nen ga Tattara Densetsu ni Natteita - Chapter 247 - The True Ancestor

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

Wen Xuan, the chief disciple of Shui Yunzong, respected the teacher halfway and loved his fellow students, was a model among his disciples.
    He had thought he would spend his life like this.
    Until one day, he met an open younger brother.
    His brother told him that this world is actually a text.
    And he, as the ugliest and humble negative character in the text of the upgrading and upgrading, will be bumpy in the second half of life, departed from relatives, and desolate.
    .
    “Too many people have talked about your life in scornful sarcasm after tea. No one knows how you spent those years and no one sees how you hold onto the bottom line in the lonely struggle. No one cares about the suffering you have experienced and your persistence. But I have seen it and I know that I care. ”

    “So I came to this world and became your dependency.”

- Description from Fpzw

She was once the all-commanding queen of business, but when she woke up once more, she found herself disguised as the second young master of the Prime Minister’s residence!

Wang Xuan entered Longmao Square and was trapped in it. When he finally left, it turned out…

This is the last building on earth.

- Description from novelbuddy