Martial King's Retired Life - Book 13: Chapter 91

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?

This book is about Jay (ceo of Mariano Enterprises) and Keifer (ceo of Watson Enterprises) falling in love. Ofc Jayfer is the endgame :)

After Adam takes over Han, the “crippled” third son of the Tenaxis Family, he learns the truth: the body is sealed, not crippled.That same day, his Black Dragon bloodline and Dark Mana ignite, and his mother gifts him Xena, a Dark Priestess she broke and bound to his service.Armed with new power, he studies the Dark Arts and fuses them with his dragon heritage, stepping into a world that devours the weak.First objective: find the one who sealed him and kill him.