Infinite Harem System: I Grow Stronger From Every Female Lead - Chapter 144: Master Mind (3)

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

I fell into a game world out of nowhere with an instant kill skill.
And then somehow, I became a bigshot.

Kim Min-jae thought he was just borrowing his sister’s new gothic romance novel. Instead, he wakes up as Kaizar Amagi, the man who ruins everything for the novel’s beloved heroine.In the original story, Kaizar is a ruthless schemer who marries Duke Meical Vukasin, the heroine’s destined partner, purely to destroy her. He dies hated and alone.But Min-jae isn’t planning to die for anyone’s plot. If he’s stuck as the homewrecker, he’s going to be the best damn homewrecker this world has ever seen.He plays his part flawlessly: charming Meical, dismantling the heroine’s plans, and smiling sweetly as she loses everything she holds dear.What he doesn’t expect is for Meical to fall for him for real or for the story to reveal a hidden BL route that was never in the book his sister read.Now, in a world of revenge, lies, and dangerous passion, Kaizar isn’t just ruining the heroine’s fairytale ending… he’s rewriting the entire story as his own.

Qin Yichen returned to his youth with his memories of more than 10,000 years. Superb mental strength, advanced elixir formula, advanced martial arts.

- Description from xbiquge