I, The Celestial Dragon, Rule The Heavens Through The Double Gate - Chapter 125: Cocoyasi Island. Marines Patrol

Hamel, a warrior who traveled with his colleagues to exterminate the devil. Yet, he died just before the battle with the devil started.

“Yes.”

What the hell?

He was reborn as the descendant of his fellow warrior, Vermouth.

The descendant from the bloodline of the great Vermouth, Hamel. No, he was now Eugene Lionhart.

“It was already enough me having the delusion that I was a genius in my past life. But… this… It’s… It’s incomparable.’

From a dying body to a new body, he has the achievement that he did not have in his previous life.

And, a reincarnation of an unknown origin, the reality of living together with the demons.

Facing a new world where everything is questionable.

The journey of the unfinished previous life begins with Eugene’s body.

The ill-fated high school student Liu Yuan obtained the inheritance of the top civilization in the universe and changed his own destiny. He also used many powerful technologies in the inheritance to lead the Chinese nation to rise in the universe.

- Description from novelbuddy

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?