My Shadow Monarch's System - Chapter 42: The Spy.

After a series of life-changing events, Pei Ge decides to start anew and rediscover her place in this world. She gets a new job, new friends and… a new boss whom she mistakes as a male host!

He helps her to get revenge on a back-stabbing friend, supports her when it seems that the world has given up on her, encourages her to be more confident about herself and even… messes up her blind dates!

With her strong working abilities and fiery attitude, she manages to climb up the ranks in the company (under the devious scheme of a certain CEO) and even gains a fan girl who can’t wait to be her sister-in-law.

As Pei Ge navigates through the ups and downs of office politics, family drama, finding her right partner and societal expectations, she realizes that things are not as simple as it seemed and everything she had believed in is tested…

The Big Misunderstanding:

“You asshole! Why didn’t you use protection?! I’m pregnant!”
“…It’s not mine.”
“Asshole! You actually dare to not admit it?! I gave all my firsts to you! You jerk!”
…
At the gynecologist, she read her pregnancy lab report and was stunned: Irregular period.
The man raised an eyebrow and smirked, “Didn’t you make a ruckus about being pregnant with my child? Where is the child?!”
“…” Who is scared of who? Let’s make a bet!

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

The world had started doomsday, and I struggled for a year, before I died under an enchanted beast’s claw. Heaven has given me another chance, back a day before the end happen. Will I be able to change my fate, and that of my loved ones? Now, I will start my journey on becoming the strongest on the planet that the Gods have changed into a game world.

- Description from Novelupdates

After the Catastrophe, every rule in the world was rewritten.