Child of Light - Volume 1: Chapter 2 Choosing the Light Element

After his girlfriend broke up with him, wandering all over the place, Xia Tian happens to see a girl about to be hit, after he saves her, he ends on the hospital. Now thanks to his accident Xia Tian awakened the ability to see through anything, be it weak points, or through clothing, nothing escapes his eye. Especially girls.

- Description from novelupdates

They hunted my kind for extinction but I came back as their nightmaresnon human mcDarian once the strongest Dragon Knight in the Empire, died protecting the last dragon from extinction. Betrayed by his comrades and burned alive by holy fire, he vowed vengeance with his last breath.But the gods answered—with a curse and a gift.Darian reincarnates hundreds of years later... as the last dragon egg hidden in a cave deep beneath the earth.Now, inside a fragile shell, he remembers everything. The betrayal. The genocide. The lies told by the human kingdoms. And as his body slowly grows, so does the power of ancient draconic magic—and the System embedded into his very soul.> [Draconic Evolution System Activated]Choose Your ElementUnlock Ancient MemoriesDevour Magic Sources to Accelerate GrowthHatch When Power is ReadyHe must hide from dragon hunters, manipulate desperate adventurers, and absorb mana from the dying world to hatch once more—stronger, darker, and more terrifying than ever.And when he emerges?> The world that burned him will feel true fire.

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?