Tensei Shitara Slime Datta Ken (WN) - Chapter 18 – The End of Turmoil

“From today onward, you’ll take your brother’s place and take over the inheritance of the Gu family!” With her mother’s declaration, she became her twin brother’s substitute.

Dressed as a man, but unwittingly enticed a lot of sisters!

Incidentally, she also captivated the younger sister of the most powerful authority in China, shouting to marry her!

Ming Shao was furious: “From now on, you will follow me. I will train you to be a qualified brother-in-law!”

Since then, she eats with Ming Shao during the day and lives with Ming Shao at night.

She has always thought that Ming Shao treats her as a prospect brother-in-law, but one day, Ming Shao pushed her down the bed and plundered her mouth!

Hey! Didn’t he say he wants her to be his brother-in-law, how come he turned into her boyfriend?

- Description from Novelupdates

He was on his way to buy some beer to celebrate his acceptance as a civil servant when he was suddenly isekai’d by truck-kun.

[Mature Content]I was born a bastard to the Archduke of Beloria, scorned because of my odd-looking hair and sickly body, maltreated by my stepmother and sister.And my father? He never looked my way. I was the reminder of a mistake he could never accept.My entire life should've been trying to live through my days as a labeled whores daughter and the taint to the noble house but everything changed when my marriage to the Lycan Monarch was announced.Lycans are apex predators, superior beings, beastmen, and originators of those horror stories your parents told you about to make you behave. My father saw fit to throw me to the beasts as a means to reclaim the lost lands.I was the bargain for a better future for the last human kingdom, but I felt more cursed than blessed. Forced into training to please a beast and ensure I was fit to be his wife.I dreaded the day I'd wed the Monarch and be treated no less than human meat. I've heard stories about him, and they are far worse than any combined. They call him a mindless beast, merciless, the ultimate feared being in the entire realm, and the terror that bested the vampires in war and ended it under his rule.My future was bleak.But when the day arrived and I set my gaze on the beast I'm meant to marry... I realized Drevon Balthar was unlike the rumors; they didn't tell the whole story.

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.