I Became a Nobody in My Favourite Novel - Chapter 15: “The Mini-Boss”:7

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 hope my wife liked the arrangements... for the wedding night."

In a world where fate is scripted and power determines survival, Arthur Nightingale was never meant to shine.When he awakens in the world of Saga of the Divine Swordsman, he isn’t the destined hero, the villain, or even a major side character—he’s an extra. A nobody. A mere background figure in the shadow of Lucifer Windward, the overpowered protagonist who will one day ascend beyond gods.But Arthur knows the truth.The world he now inhabits is doomed. The plot is destined for a catastrophic downfall, and the so-called “geniuses” will not be enough to stop the tide of destruction. Armed with knowledge of future events and his own will to defy fate, Arthur refuses to be just an extra.

“I'm going out to do something, so I can't take care of you any more. You can go down the mountain and have fun. But if you can't find someone who matches your Innate Pure Yang Body in three years, you're finished!”These were the last words the old man, who was Lionel Yeager's teacher, threw to him before he vanished. Meanwhile, having mastered most of his master's skills, Lionel Yeager went down the mountain and took his first step into civilization for the first time in years.With his unparalleled medical and martial arts, he sets forth on a journey, befriending new allies and crushing all the enemies that stand in his way, as he attempts to resolve his Pure Innate Yang Body constitution, and cultivate to the top of the world!