The Geared Immortal - Chapter 5314 [Bonus Chapter] War Of The Gods And Demons:

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

Chen Qizhao was reborn and returned to the age of 18 when he was still the wicked little overlord of the Chen family.

At this time, his brother hadn’t experienced a car accident while his parents were in good health and weren’t seriously ill. The Chen family was still the prosperous Chen family and everyone thought he was a good-for-nothing who was useless and easily taken advantage of.

“He only knows how to quarrel with his older brother every day. He is arrogant and willful!”

“He looks good, but unfortunately, he is an idiot.”

“Isn’t he a useless person? Just serve him well.”

“It is a pity about that child of the Chen family.”

There were the group of scoundrel friends who were full of thoughts, the rats eyeing him covetously and the old, cunning people who were secretly scheming.

Chen Qizhao put on a mask of arrogance again. ‘Do you like acting so much? Why don’t we act together?’

It wasn’t until later that everyone discovered that at the end of the play, they would either go bankrupt or be imprisoned.

- Description from Novelupdates

Logan Mercer, an orphan barely surviving on his own, awakened the Spending System as a child.But as a broke teenager struggling to even pay his rent, how could he possibly use it?Bullied by his classmates and cast aside by society, Logan’s life changed the day he was suddenly surrounded by men in black suits.“Your father has been missing for over a year. As per his will, you are to inherit all his assets,” they said.To his shock, Logan learns that he was the sole heir of the Mercer family fortune — and with it came control of major businesses, unimaginable wealth... and the constant threat of his father’s competitors.“System, redeem one billion dollars,” Logan said.[Redeeming One Billion USD...][Congratulations! Your E-rank fire affinity has evolved into SSS-rank Phoenix Flame Affinity!]Now blessed with talent and wealth, all that's left is training relentlessly, growing his core, and unlocking even more different affinities within it.Follow along as Logan uses wealth and determination to rewrite his fate and grow stronger than anyone ever imagined.

In a future timeline, the earth was visited by a species known as the Slarkovs.
Having lost their home planet and in search of a new one, earth was the next habitable planet for them.

Humans and Slarkovs made a deal with each other in return for the Slarkovs living on earth.
The Slarkovs traded their technology and knowledge for a new home.
They were similar to humans except for some of them who had slight differences so fitting into the society wasn't a problem.
Over the years Slarkovs and humans began to mate with one another and reproduce offsprings.
This in turn created a new species known as the mixed-blood.
Centuries later mixedbloods could tap into their bloodline and perform unimaginable feats.

Gustav born into an age where bloodline determines everything, struggles to fit with a useless bloodline.
His bloodline only grants him the ability to change his hair color, destroying his hopes and dreams for a great future.
His fate is turned around when an unexpected situation leads to him finding a system that grants him the power to unlock and upgrade bloodlines by completing quests but he's baffled by two quests with a five-year deadline. Success will grant him unimaginable rewards...
But only one thing awaits him if he fails... Death!

Follow Gustav on his interesting journey filled with unprecedented adventures, danger and death, maybe?