The Reborn Otaku's Code of Practice for the Apocalypse - Chapter 22

Even in his dreams, Li Tianming can’t stop himself from laughing! Why? Because, his family pets are all the Primordial Chaos Beasts of myth!

Tang was cheated by her husband who got another woman pregnant. Tricked by the mistress and mother-in-law, she had been criticized by the public and kicked out of her husband’s family. Then, there comes Su, who showed up like a saviour for her, prevented her from all the difficulties that her ex’s family made to her. He held her in his arms, haughtily said to them, ‘It will only be me that can bully my girl! Anyone who dares to bully her is opposing me!’ She was shocked. And her mother-in-law said she was a wanton woman. After that, he was always protecting her, treated her preciously. He made her realized that even the second marriage could also make her so happy!

- Description from Novelupdates

I returned to Earth as the invincible Knight King. But the Gods came with me.

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.