Awakening: My Yandere sister is obsessed with me - Chapter 19: Promise

I met the male lead in prison.

Spicy Fabre, a YouTuber specializing in poisonous insects and venomous creatures is reincarnated in a Murim. The Tang Family of Sacheon wants him.

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.

Reincarnated into an eroge brimming with cunning and seductive women, Shia quickly learns this world is no paradise. His childhood friend? A manipulative beauty with a penchant for control. The maid? A silver-haired, venomous tsundere. Even the elegant motherly figures hide sharp fangs behind their kind smiles.Fortunately, Shia knows this world’s secret: a unique system that only he can use. From making alliances with snake-like in-laws to hosting wild parties in the elf kingdom, Shia takes charge as the self-proclaimed administrator of chaos. But taming bad women isn’t easy, and Shia’s life quickly turns into a whirlwind of power plays, unexpected friendships, and wild nights.