The supporting character's harem is very normal - Chapter 510: Do you want to get out of this place?

This is the story of Long Yi, who was killed because he took revenge for the girl he loved. Before he dies, a strange lightning carries his soul into a different realm. How will he live, when the first thing he noticed upon arrival is that, the man whose body he possessed is raping the country’s princess?

- Description from Novelupdates

Growing up in a cursed world, brought up in a country of warriors and soldiers, Nero was always eager for the day he would awaken his innate ability, and gain the chance to become an Eldrim Card master! Eager for the day he could fight against hell, hail and damnation itself and rid the world of its many curses.But the day his older brother was framed and sent to the frontlines to die, he woke up to a new truth. The notions of his youth - camaraderie, brotherhood, patriotism - they are all fake, and in the eyes of the powerful he and his ilk were just cannon fodder. In this cursed world, humans were curses too.He continued to wait for the day he could awaken power and rid the world of its curses - all of them!WSA 2024Hey guys, for access to maps, character pictures and more check out the discord. For those that don't use discord, I'll think of something so you can see them as well!Discord: https://discord.gg/xTWUR5BnD2

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?