Clan Building System: I'm not the Protagonist?! - Chapter 304- Updated*

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

When Ye woke up, she found that everything had changed. His spiritual power is gone, and the beauty master is gone. He himself became a waste of the wealthy Ye Family, was forced to change his marriage, could not cultivate the waste, and countless people wanted his life. If you want to change your life, you can only rise strongly. Only the hand can cover the sky, the most powerful Wu Shen!

- Description from Ptwxz (translated)

Renji Takeda didn’t expect to die from drinking too much sake. He also didn’t expect to wake up as Leif Thorenvald, the second male lead in a romance novel.But wait—shouldn’t he have transmigrated as a villainess? Or maybe an omega in some steamy Omegaverse? Nope. Fate clearly enjoys a joke.Now he’s trapped in a story where the heroine wields divine powers, the villainess plots in silk gowns, and the dashing Grand Duke is destined to win the girl. And Renji? He’s the poor sap who gets rejected with a smile.There’s just one tiny issue.Renji is gay.So instead of sulking and chasing after a woman he has zero interest in, he tosses the author’s script into the chamber fireplace, packs his bags, and flees to the cold, quiet North to enjoy his second life in peace.Everything’s going perfectly... Until the Grand Duke, Alvar Ragnulfsson, shows up. The supposedly straight male lead is suddenly far too close—lingering stares, casual touches, and an interest that’s definitely crossing the “just friends” line.Suddenly, the overlooked second lead might be headlining a very different story.Between politics, divine powers, and a dangerously attentive Grand Duke, Renji has only one question:Is he rewriting the script... or is the script rewriting him?

Ai Qian, a street-crazy author who wakes up every day because of her own poverty, is bound by the system!
The system is obedient: Host, you are the daughter of a rich family, you are a billionaire female president, you are a superstar… Are you happy?
Ai Qian: Hehe, I might be happier if there is no hero who can kill me at any time.

- Description from novelbuddy