His Contractual Mistress - Chapter 519

An ordinary youth living in the year 2050 in the Western calendar accidentally came to a fantasy world created by the collision of magical elements and supernatural technology at the other end of the dimension…

- Description from novelbuddy

A never-before-seen event has occurred in Ancheng! What happened? The Crown Prince of Di Jue unexpectedly has a son! Mo Chuxi is baffled—he’s still unmarried! Where did this son come from? Having a son is one thing, but what’s this? There’s also a daughter!Inside the narrow car cabin, Mo Chuxi blocks the woman, “Lady Yan, can you please explain what’s going on? Hmm?”“...”One morning, Little Baozi is holding Big Baozi’s hand, blinking his innocent watery eyes as he looks at Mo Chuxi.

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?”