MTL - Mysterious Young Master, Super Cool - Chapter 23 Meet young people in the underworld

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

—〔WSA 2025 ENTRY〕—What happens when fate twists reality itself? What if someone finally obtains the one thing they've longed for since birth?Arvian got reincarnated into a horrible novel after performing a ritual to claim mysterious rewards offered by Webnovel—the Webnovel System and an Exclusive reward.Waking up in a cave surrounded by a villainous organisation, Arvian found himself; luckily, he was reincarnated with his own body.He sees cruel people, bloodlines, demons, reapers, monsters, and elves, and unfortunately gets dragged by UNHUMAN MISSIONS.Follow Arvian as he finds himself stuck with unhuman missions after failing a mission.Ding!][System Initializing...]...[All Activation Conditions met][Webnovel System Activated!]Congratulations! The Webnovel System has been successfully activated![Webnovel System]:「Gain 3x rewards for completing quests, missions, or eliminating enemies.」「Access the Novel Store, where you can purchase any item or ability of your choice from the novels you have read.」

Upon waking, Wang Shan finds himself in Room 888, the most luxurious accommodation in Cloud City, typically reserved for the wealthiest. Despite his complaints about the “”subpar”” room, five stunning women are waiting to inform him of his first-place assurance in an upcoming test due to his powerful father’s influence.A stranger to this world from the 21st century, Wang Shan learns that martial prowess is paramount, categorized into nine realms. Today, he must take the One-star Cultivator test, despite his supposed lack of innate talent. His father’s status as the ruler and a formidable Two-star Expert guarantees his victory, but the arrival of the gifted Zhang Bao poses a deadly challenge.As Wang Shan bathes, he hears a voice in his mind: “”System binding, binding successful.”” A powerful trading system allows him to trade anything he touches, enabling him to instantly advance his cultivation. With newfound power, Wang Shan contemplates his next move. Will he overcome the threats and rise to greatness with the help of his mysterious system?

Jiang Pengji got something called the Court Intrigue Stream System.
System: “Your goal is to become the most prestigious woman in the kingdom (the Queen)!”
Jiang Pengji: “Okay, System. No problem!”
Years later, she met the target by becoming the most prestigious woman (the Empress).
Jiang Pengji: “Well done, no?”

- Description from Novelupdates