I Alone Level-Up (Web Novel KR) - Chapter 101

This is the story of Kir, who has to thwart the will of Heaven, Hell, and his parents in order to survive, protect the people he loves, and achieve happiness.He just has to make it through life at a magical academy, avoid dying, and survive to find his birth mother, the lost Daughter of Heaven. Or be forced to take his place at the side of his father, a Duke of Hell bent on destroying the way things are.It's a lot to handle for a quiet, brooding angel boy.Fortunately, he has company. A succubus, a foxkin girl, and a half-angel boy to start. And Kir has his own secret: this isn't his first go at life.

Davi was born into a prestigious family of powerful explorers, yet he did not inherit his father’s legendary class.Because of this, he was scorned throughout his childhood. Still, through relentless determination and the support of his best friend, he managed to save enough money to leave his hometown and enroll in the Explorer Academy.Then fate dealt him an unexpected hand, and he received the bizarre class [Harem King] and began his journey to become the greatest explorer of all time.What to expect of the story:- A lot of tension and life-or-death battles- The protagonist’s growth through hard work- And, of course, a harem.

An ordinary student accidentally traveled into an other universe and became the king of a small kingdom. He had gotten a “Cheating Code” of life and was able to complete something extraordinary. This is the story about a king that was able to conquer continents and leave behind him an ultimate legend that will be recited between every generation to come.

- Description from novelupdates

What got summoned was the world’s strongest sociopath.