MTL - Outside Of Time - Chapter 350 Letter from Zixuan

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

[Of all the music I’ve ever heard, it’s your voice that calms my soul. He whispered]***Tang Xue Mei was the legitimate heir of the company, but her best friend caused her to lose her sight and her status. She was tortured every day until she ended her life. To her surprise, she was reborn three years before her death!Now, she isn't going to waste her second chance. With a new lease on life and the determination to change her fate, Xue Mei finds herself entangled with a man suffering from insomnia, who offers her power in exchange for her help in curing his sleep disorder.Feng Shihan, CEO of AG corporation, had everything from looks, fame and wealth, but he could never get a good night's sleep due to his rare severe sleeping disorder. Until he met Tang Xue Mei, he never thought he could get a decent sleep.But then he finds out that as long as she's on the bed with him, he could sleep as well as he liked. She was his miracle sleeping pill.Soon he finds out she’s difficult to get, so he proposes a form of alliance to her.“Miss Tang…if you agree to be with me, I’ll give you all the power you need…”In a desperate attempt to gain power and get back at those who had hurt her, she agreed to his request.

Humanity was on the brink of destruction. Muyoung, an assassin from the Forest of Death, fell to his knees. There were corpses all around him. For years, he had worked for the Forest of Death and had finally been able to eradicate them. Now, he, himself, was about to die. He closed his eyes as he felt his heart stop beating.

In the first reincarnation of Earth, the immortals vanished.In the second reincarnation of Earth, the dragon race disappeared.In the third reincarnation of Earth, mankind faced despair.Living in the third reincarnation of Earth, Ding Huan does not want to die.