Beautiful CEO's Top Martial Expert - Chapter 13 - Intrusion

At nineteen, Alex Lane's life revolved around caring for his sister, Iris, after their parents' death. When Iris was diagnosed with Breast cancer, Alex turned to running illegal packages to pay for her treatment. His life spiraled into chaos after running into problems with the most dangerous gang in the city, the BlackWolf Gang.Things turned ugly quickly when Alex and his sister, Iris, were hunted down by the BlackWolf Gang and unfortunately killed.But death wasn't the end.Nemesis, Goddess of Divine Retribution, saw in Alex the perfect instrument of karmic justice. She granted him rebirth as Andre Atlas, son of a reclusive billionaire, and gifted him the Karmic System—a power that grew stronger with each crime he committed, especially those serving as poetic justice against the powerful.Now, as Alex builds his criminal empire from the shadows of high society, with each crime bringing new supernatural abilities he will achieve his one goal.His goal: Destroy those that took everything from him!

In the waves of steam and machinery, who could achieve extraordinary? In the fogs of history and darkness, who was whispering? I woke up from the realm of mysteries and opened my eyes to the world.

Firearms, cannons, battleships, airships, and difference machines. Potions, divination, curses, hanged-man, and sealed artifacts… The lights shone brightly, yet the secrets of the world were never far away. This was a legend of the “Fool”.

- Description from novelupdates

Once upon a time, a hero had been summoned to a different world in order to defeat the demon king. After the war stretching 3 years ended the commendable hero slew the demon king. And he was forcibly deported back to earth after being dismissed.

Such bullshit!

Elves in addition to beast race, dwarfs and demon race. Even though I wanted to make a harem in the different world I saved! My dream will not come true on earth, where there is no magic at all. Thus, the hero returns on his own. Without the blunder of being extradited to earth this time, he will build a harem of his own in a different world.