Global Killing: Awakening SSS-level Talent at the Beginning - Chapter 14:

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

Author Note: This story is only for those who like reading about overpowered protagonists, as our MC is going to be more than just overpowered.He is going to thrash anyone who comes in his way while enjoying his life.Also, it's a world travel novel; for those who have an interest in world travelling.................................................................The story is about a person who has lived through many lives, seen incredible things, and become one of the strongest if not the strongest beings around. Although he struggles to remember his past, he is determined to grow even stronger by utilizing his personal system as that would bring back his memories. He has one main mission - to enjoy life to the fullest - and he is absolutely committed to achieving it.Follow through the journey as he becomes the strongest (again?) and regains his memory while also enjoying his life along with his system and some other people.

Transmigrated-into-another-world-three-good-citizen Gu Xizhou, in order to survive, became a demonic cultivator. No matter how bad or evil, he adapted.

But then…but then he transmigrated back.

The returned Gu Xizhou was very angry. The student that offered his body in order to resurrect him had used a formation that was purposed for summoning evil spirits. He, Gu Xizhou, prior to transmigration was a law-abiding citizen that upheld core socialist values, a three good citizen representative. So how come after transmigrating and coming back, he had become a heinous malicious spirit?!

In each and every one of the spirit worlds, the ghosts and spirits originally lived a Heaven is first and I am second kind of happy lifestyle, that is until in the unlimited spirit mission worlds, inexplicably and out of nowhere came a demonic cultivator.

The ghost and spirits: QAQ

- Description from Novelupdates

Ye Xiwen was previously only an ordinary university student on Earth, but unexpectedly crossed through into the world known as the Zhen Wu Jie world! In this world, formidable warriors are capable of turning over mountains and collapsing the ocean, destroying the sky and extinguishing the earth! He originally had ordinary aptitude, because of that he received the mysterious special space! Any martial art can be deduced within the mysterious space, other people practice for decades, he only needs a year! So long as he has enough spirit stones, any talents he faces are all floating clouds!

- Description from Novelupdates