MTL - A War Between Spies - Chapter 1421 Where is wrong?

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

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

It tells a poignant love story. He was the most heroic man in history, and before his death he sang a sad song about a woman; she was the most charming woman in history, and before her death she danced a story about steadfast love. The story of the two had no beginning, only an ending of parting in death. After his death, he became a demon for her, and fought fiercely with the immortals of the three realms. After he was killed, his unique seven souls were hidden in various places by the immortals; she became a ghost for him, and before she passed away, she smashed Meng Po's soup bowl, and her soul flew away. Even so, he still vowed to subvert the three realms, find her in the next reincarnation, and marry her, even if it took a thousand years.

After finishing playing mahjong, Yu Zhou, a recently resigned writer, returned home and found a young lady from ancient times, Xiang Wan, who was a former prime minister’s daughter, sitting on her sofa. After some simple communication, Yu Zhou, with her adolescent mind, accepted this “roommate” who had traveled through time.

On the other hand, Yu Zhou’s novel was adapted into an audio drama, which was unexpectedly performed by the well-known voice actor Su Chang, causing Yu Zhou to be overjoyed yet also in tears, because Su Chang was her ex-girlfriend.

Through their new connections, the girls re-examine their own lives and achieve personal growth. This absurd yet realistic experience may also “pat awake” Yu Zhou’s stagnant love life.

- Description from Novelupdates