A Guide to Raising Your Natural Enemy - Chapter 2

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

A knife in the pregnant Luna’s belly.All evidence points to the Alpha’s scorned concubine.Althea didn’t do it.But no one will believe the wolfless omega who was rejected, humiliated, and made his slave.So she runs—straight into the Red Mist and into the jaws of the one creature that even the Alpha hunting her fears.---Thorne Vargan, the Hellhound of the North Clan, swore bloody retribution on everyone responsible for destroying all he had ever known—especially the woman who beheaded his mother.As fate would twist it, that woman’s daughter stumbles into his hellish domain…And Thorne is not letting her go.He claims her.As captive.As leverage.As vengeance.But the fates have a different tale to weave as something in him hungers for her in ways far more dangerous than hate.Her scent tempts him.Her fear intrigues him.Her secrets threaten to set his blood—and the entire pack system—on fire.And while Thorne pins her to his world with claws and shadow, the Alpha she fled is coming.He wants his little omega back.

All the experts were defeated, I want both beauty and wealth! The Dragon King returns to the city, bringing an end to peace! This is the legendary tale of a cultivation fiend.

Yu Zhengdu joined a small start-up company that claim to offer “life management services”……as a programmer.

On his first day in office, he received a phone call from a stranger: “Hello, I received a text message from your company that informed me of my reincarnation tomorrow……”

Yu Zhengdu: “……??”

Shang Que, the beautiful little boss, said, “New employee, welcome to the Hell organisation in the human world. A thousand years ago, I was known to the human world as the Ghost King of Luofeng Mountain.”

Yu Zhengdu: “……??” From then on, he was incredibly distressed about the development of Hell.

- Description from Novelupdates