The Perfect Run - Chapter 46: Chekhov's Gun

Damien Julian is an 18-year-old loser, who has been bullied and mistreated his entire life, at home, he has to deal with his abusive father, and at school, he is constantly been bullied by delinquents, and to make things worse he is always looked down upon by his peers, till one day a mysterious screen appear before him as it said.

[The world has seen the lingering evil in your heart]

[Would you like to be one of the nine demon kings of this world]

[If so what are you willing to sacrifice?]

In the heat of the moment, Damien made a deal with the world, that he would give up everything he owns, or do anything it wants, and in exchange, he shall be reborn as a new Demon King, and what the world required from him as payment was.

[In exchange for power, become a slave of the world, and act as an anti-body for all eternity]

At that moment, Damien agreed, but little did Damien know, that becoming a slave to the world meant he has to be its immune system, what that entail is, that anything that threaten the world must be destroyed even if he has to wipe out humanity, to save it, or assassinate historical figures to bring fort balance or even manipulating events that can potentially end the world, to save the world, this is the story of a necessary evil, not the story of a hero who cares for others.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

This is a world where science and magic coexist.

Some people here seek powerful magic, and some seek eternal truth.

A science tyrant who came from another world, started as a little librarian, with magic in his left hand and truth in his right, kicking the door of the new century with one kick.

Some people call him the forerunner of magic, some say he is the founder of science.

Some people describe him that way.

In the new century, Blair is a symbol of evil.

- Description from novelbuddy

“Ruan Ruan, don’t think about leaving me.”The cold lips landed on the corner of her eye, and Su Ruan finally realized she had truly been reborn...In her previous life, she believed the scumbag man and cheap woman, and was ultimately pushed to the Insect Race, dying a miserable death. However, the man she always despised remained devoted, loving her broken body even after her death.In this life:“Ruan Ruan, is someone harming you? Then I'll kill them all.”“Ruan Ruan, you can only be mine.”“Ruan Ruan, I beg you, don’t leave me...”The Federation Empire's highest Commander, Lu Shinian, does everything possible to keep her by his side.Having thought that after being reborn, this Commander addicted to paranoia would only offer a cold hand to hold. Who could tell her that the “big dog” with fluffy wolf ears whimpering by her side every night is really Lu Shinian, the highest interstellar Commander?“Ruan Ruan, I want a kiss.”“Ruan Ruan, hug me.”“Ruan Ruan, why are you ignoring me again, boo hoo.”In the interstellar era, strength is revered, and the 3S Lu Shinian is a strongman among strongmen.But he is ironically shackled by an atavistic phenomenon that uncontrollably appears every so often. Wolf ears that suddenly spring up, an extra tail, all do not match Commander Lu’s image.From then on, to maintain his cold and towering image, Su Ruan covers Commander Lu's little ears, continuously working hard!Star Network spread that Su Ruan publicly jilted Lu Shinian, embarrassing him, and she would surely be hated and despised by him.But later, at a certain graduation ceremony, someone saw the always abstinent and aloof Commander Lu pin Su Ruan against the wall, corners of his eyes red, his voice aggrieved, “Ruan Ruan, kiss me.”