This bodyguard is too invincible - Chapter 31: Annulment of Engagement

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

Battered, injured, jaded and marvellously wreaked. Luis Lee was one of the powerful ability users during the chaotic time of the apocalypse but that was until he found himself reincarnated in a magical world full of hunks and gorgeously powerful moon elves. At that moment he thought, “Let's live a slow slutty life, (b)itches!”These long-eared hotties needed him for something and the new moon elf lord was determined to do nothing.However, an obnoxious system was added into the mix saying that he is reincarnated in a world of a book.System administrator: This world will usher an Apocalypse after a decade. So enjoy your stay (b)itch.Few days old moon elf lord: Will I ever get a proper rest?A story of a perverted soul who just wanted to get laid starts now.

Known as the youngest academician-level senior engineer, Zhao Guoyang was reborn in the 1990s. In this era of economic globalization, with his extraordinary wisdom and extraordinary insights, he created one miracle after another and became a name that shocked the world!

Wisdom is condensed every bit, brilliance is created by sweat, and witness the rise of a great power!

- Description from novelbuddy

Gojo Satoru always knew he could travel back in time whenever his life was in danger. After surviving betrayal, the battle at the Prison Realm, and his fight with Sukuna, he realized he needed a fresh start. When he opened his eyes, he was sixteen again—his first day at Jujutsu High. Nothing had happened yet. This was his chance to change everything.But something was wrong. Geto Suguru was missing.Gojo searched all of Tokyo but found no trace of him. Then, a year later, during a mission near Shinjuku Station, he spotted a familiar face—a boy with a bun and strange bangs.Gojo’s heart raced.Geto Suguru: “Who are you?”