MTL - From Arms Dealer To King of War - Chapter 623 this is war

This story is centered around the man named Yi Ji-Hyuk, who has spent 1000 years in a Medieval Western fantasy-like world before returning back to the modern-day Earth. When he returns, he finds that his home is facing monster threats, and that humans with superpowers have appeared to protect the innocent people of Earth.

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?

Will you forgive them or seek revenge? Forgiveness and revenge are, after all, the two inevitable outcomes when faced with betrayal—rather, the two sides to behold of the same coin. No matter how many times forgiveness surfaces, revenge is equally likely to occur.This is the tale of a man who has endured countless betrayals throughout his life. One might even say he's been betrayed by his own fate. Yet, he has always chosen to forgive and move forward with a cheerful smile. Revenge never really occurred to him— not even once.However, his life took a dramatic turn when he gets involved in a tragic accident, meeting a miserable end. But fate had other plans, and he was reincarnated in a different world. With his newly acquired body, he starts his life as a Mage Class Adventurer, only to face the dark reality of the world. The atrocities he witnessed—enslavement, smuggling, trafficking, and so on—were nothing but the tip of the iceberg. The Dark Morals of the world remained untouched.What secrets lie hidden? What darkness shrouds this world? One must join him on his journey to discover the truth. As he continues surviving in this new world with certain ambition and purpose, he also acquires a 'System' to enhance his potential. With each level and skill upgrade, he conquers the chaos and earns a title no one ever will ever be able to attain.[“Do read if you feel like reading my creation. Your support is what gives me inspiration to carry on”— El Sandra.][Note: My novel contains violence and harmful events. Reader discretion is strongly advised]

This is the love story of the 2nd brother of the Dragon Family. He is one of the most successful businessman in the capital and one of the Emperor’s favourites – he is the most eligible bachelor in the capital and every lady in town wants to marry him.

The story starts with the female lead, Ju Mu Er, a blind teacher of guzheng, who goes to pay a visit to Long Yue to ask him to build an awning on his popular business street so her friend, a flower seller, will not get wet and fall sick. Long Yue laughs at her (because he loves money and is calculative) and she makes a bet with him that she can allow him to escape from a pesky female suitor without making it obvious.

She successfully wins the bet and from then on, Long Yue constantly makes her life a trouble (since she costs him so much money)…. not realizing he is slowly falling for her.

- Description from Novelupdates