Isekai Maou to Shoukan Shoujo no Dorei Majutsu - Volume 1 Chapter 1.11

Silas Blackwood wakes up with a machine in his chest – his missing mother's parting gift to help him survive the war with the Fae. This “system” grants him bizarre abilities: neuromancy (magic of the mind), biomancy (magic of the body), and essomancy (magic of souls and essences). Oh, and it fused a leviathan's mana core into his body. Because why not become part sea monster?At Arcanium University, a military boot camp churning out mage knights, Silas finds himself targeted by rich brats who think being born with a silver wand up their ass makes them special. When they leave him for dead, Silas decides it's time to show these spoiled kids what real power looks like.As Silas grows stronger, he discovers he can upgrade himself by absorbing essences from magical beasts and demons. Just when he thinks he's got a handle on things, Silas learns his mother's alive, and now he's got a new mission: a rescue that'll take him and his friends straight into the depths of Hell.

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?

Ever since Yang Fan returned to the village, the young women had been practically breaking down his door...

[Powerfulcouple]The entire Yong City knew that Eldest Miss Su of the Su Family had a malicious nature and a scandalous reputation, acting outlandishly day after day, much to her family's disgust.Worthless dad: “I certainly do not have such a daughter; my only daughter is Xinyan.”Old Madam: “Shameless thing, you've completely thrown the Su Family's face away.”White lotus younger sister: “I'm sorry, Sister, we were never people from the same world.”Scumbags: “Trash that can't show their face in public, lowly people don't deserve to enter our circle.”However...Before Eldest Miss Su had expressed her opinion, various bosses couldn't hold back any longer.A certain Film Emperor: “Picking on my boss—tired of living, are we?”A certain Association: “Mr. President, please instruct, bankruptcy or banishment?”A certain Group: “What's the Su Family? Not even worthy to carry the BOSS's shoes.”Bigwigs from various fields: “Hello, sister-in-law!”Su Ran: “?”While the outside world was marveling at the continuously revealed identities of Eldest Miss Su, the man who was legendary for his mystery and restrained self-discipline swept her into his embrace.“Little ancestor, is there any identity of yours that I don't know about?” the man's voice was seductive, lazy, and casual.Sister Ran curled her red lips slightly, smiling brightly: “Your wife.”