The Black Beast’s Useless Concubine - Chapter 1: The Witch Doctor’s Rebirth!

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

Allen, an eight-year-old boy from a poor family in the royal capital, is living a poor but happy life together with his mother. One day, however, memories of his previous life suddenly come back to him and he remembers that he is in an dating sim game and that the capital will be destroyed by war if he doesn’t do something about it. If this continues, both he and his mother will be killed! With a sense of urgency, he decides to rise to the occasion in order to save his precious mother’s life and save his favorite character, the villainous young lady Anastasia, the only girl he liked in the game, from her all too tragic and ruinous end. This is the story of a man who isn’t even a character in the game, but who strives with his steely determination and uses all the knowledge he has to turn overcome fate!

Yue Xuexia is just an ordinary salted fish that rarely lives in her house, but suddenly one day she woke up, received a sign-in system, and thought she was dreaming.The sign-in system rewarded her with multiple things, including houses, money, cars, and talent scrolls, which led her to the life of the richest lady in the world.She could sign in once a day.One morning, with her eyes groggily and blurry, Xuexia was welcomed by a holographic screen only she could see. Yes, like the ones in the novels and manga.Ding!Xuexia waves her hand in the empty air and mumbles, “Noisy, I told you to turn off the damn alarm, whoever owns it!”When a robotic voice lingered near her ears saying,Signed in successfully. Congratulations to the host, and you've received [1 Million RMB in cash!]Xuexia, who is currently in need of great money, was in disbelief as she looked at the words one million and laughed.“Heh~ even in my dream, I was wishing to receive free money. What nonsense, let's go back to sleep. Yue Xuexia was about to close her eyes back to sleep when the old touch screen phone near her pillow vibrates.Bzzt~ Bzzzzzt~“Urg~ who the hell is calling now?” complained Yue Xuexia in her half-asleep state.She picked up the phone only to see a message notification saying the following words:[Your bank card account ending with 5567 had received a deposit transfer from XXXX at 6:45 am. You had received a 1 million deposit and your current saving balance is 1,003,000.00 RMB (Autumn Field landbank)]Yue Xuaxia mumbled in disbelief and said, “Fucking hell! This is awesome.”Who doesn’t like free things?~' This lady wants it too!!!

“You want to steal my genes then leave?” He grabbed her and tried to force her to hand over the child that was born three years ago.

She never had a baby? Then conceive one!

The delusional CEO’s desperate love. Her inability to resist as she fell deeper.

OK, the baby is born. She handed it to him and left!

Yet, he had her hog-tied and thrown onto the bed. Furiously boiling with anger he roared, “Woman! Who said I only wanted one?”

- Description from Novelupdates