Bog Standard Isekai - Chapter 21Book 4.

Lee Jin Woo once lived a dismal life.
He lived pitifully on a day to day basis in his five-pyeon studio filled with mold.

Then, one day, he died in a sudden fire.

When he wakes up, he finds himself inside a novel.
But there’s just one issue…
He had become the novel’s villain!

Friend Shisui faces a life and death crisis.Meanwhile, Itachi, a devoted disciple, is on the brink of embracing his destiny as the epitome of 'filial piety' within the Ninja World.The eyes of the entire clan will soon become specimens for others, because they are consumed by an obsession they cannot get rid of.Under the watchful eye of the Konoha Corrupt Quartet, Uchiha Funan, a fifteen-year-old retired cadre of the Uchiha clan, deals with overwhelming pressure. This pressure leads him to make the decision to venture beyond the confines of the clan.

Three years after graduation, Chu Mo, who could barely maintain his most basic life, opened the Shenhao system, and an unlimited and safe bank card appeared in front of him. start a company? to invest? buy stocks? These in unlimited banks…

- Description from novelbuddy

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.