Perfect Revenge : CEO's Lovely Mistress - Chapter 420 - 420 Flower-studded swing

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

Their sins got the whip of god's worst.On that fateful day, god left the world in ruins.However, in his supposed mercy, he left them with a means to survive.To protect themselves against the fiendish demons and monsters that came upon them.This gift, they called: Talents!In this god-abandoned world, Kieran Marcoth, on the day he was to receive his talent—a gift from Orion, the left god—he awakened a 'hidden' SSS-ranked talent.A talent that could only be activated once the condition was met.Instantly, Kieran turned into a subject of mockery, spite, and insults, and somehow, just somehow… he found himself riddled with injuries and on the brink of death.However, it seemed Orion was yet to forget his son.[Ding! Conditions have been met][Host has been successfully selected as a God candidate][Defeat the other candidates! Become the next God of this ruined world]Seeing the notification, Kieran couldn’t care less.Only one thought was registered in his mind:‘I’m going to fucking kill those bastards!’His journey began… Will the once-kind helper become a tyrant god?

“You will hear many of his Death Eaters claiming that they are in his confidence, that they alone are close to him, even understand him. They are deluded. Lord Voldemort has never had a friend, nor do I believe that he has ever wanted one,” Dumbledore told Harry Potter with absolute certainty.But what if Voldemort did have a friend? Not just a friend but the friend? A millennia-old wizard, who learned the secret of Hogwarts from the great Four founders, and had his own goals to take over the world?To stop that ancient wizard, an ancient power is called upon . . . in the form of a girl. A Muggle-born at that.Christina Norton has powers beyond anyone's imagination but she is too caught up in the Chosen One Harry Potter's life and catastrophes. But as she starts to uncover the plans of Voldemort, she realizes someone else is working with him. Someone who wants her dead. Why? She doesn't know. She just knows she has to save her loved ones and Hogwarts from Malgino and for that she is ready to go to the end of the world.And fight whoever comes in her way.

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.