The Great Demon System - Chapter 370: The Ultimate Sacrifice

When our protagonist becomes the game character Jun Karentia, she thinks she has it made. She may be just a lowly support mage, but with her knowledge of the game, she knows she can finagle her way to the good ending following around the main character, Fabian. The problem? This game doesn’t end after one playthrough. Jun is prepared to guide Fabian through the second playthrough to the true ending when… Fabian abandons her. Now the Grand Duke Mayer Knox—captain of the Dark Knights and the secret final boss—is determined to have her join his party. Can Jun turn the final boss into the main character? Why is Mayer Knox so intent on having her in his party? And when will these rumors about being his lover stop?!

She is the slow-witted idiot of the Prime Minister’s Residence. Everyone bullies her. He is the most respected and unfeeling Prince, with frightening ability and absolute envy! Together, they are conferred an imperial edict of marriage.

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

‘In the face of death, I have learned not to fear, but to embrace the power it grants me’ — EthanEthan, a weary office worker from the modern world, transmigrates into the body of Kai, a failed disciple in a ruthless cultivation world. His second chance is short-lived when the assassin comes after him right after his transmigration.In his final moments, Ethan awakens the Godly Revival System, which gives him the power to revive once every week and even lets him buy his Killer’s Cultivation, Talent, Mastery of Cultivation Techniques, and many more.With this newfound strength, Ethan vows to grow stronger, protect his new family, and make up for the regrets of his past life.But can Ethan truly protect his new parents and rewrite his fate in this dangerous world? Follow him on his journey to find out.