MTL - Officer Matsuda Wants To Save Himself - Chapter 121

When a glorious old civilization was toppled overnight, a strange purple moon rose and thus began the Purple Moon Era.

As the overweight daughter of the Sutton family, Kelsie is an eyesore to everyone. Her father can't wait to get rid of her, his wife and their daughter daughter too.The man she's supposed to marry can't stand her and looks for ways to end their engagement, all to no avail.But on the day she's to get married, she finds out she's pregnant.Her fiancé finally uses the opportunity to break off his engagement to her and her father sends her packing to her aunt in another city never to return after she refuses to remove the baby like he asked her to.Seven years later, she returns to the city to claim her position as the heiress of her mother's fortune, which her father and his wife and daughter has been living off of all these years.But not as the overweight duckling everyone expected, but as a stunning, glamorous woman.Behind her are three children: a daughter who looks exactly like her, a handsome son, and another handsome son who looks too much like the most powerful man in the city.Unexpectedly, the dimwit, her fiancé who broke off their engagement comes begging for them to get married like they were supposed to.“So what if you're stunning now and lost all that weight? Everyone knows you used to be an ugly duckling. Who knows the underhanded ways you resorted to to lose weight. Forget our past and marry me again.”The woman looked at him and snickered. “Aren't you the heir of the Baker family? Why would you marry a fatso like me?”The man huffed and said arrogantly. “Hmph! Do whatever you want. But I assure you that no one in Silicon Valley will want to marry a woman saddled with bastard children!”The triplets came up on his face and snorted in disdain. “Who's this? Where is daddy when a man like this harasses mommy?”“I told you he wasn’t worth her. Hurry up and call him quickly.”The man who was in the middle of a conference call ended it as soon as he heard the news and went straight to where she was.“Are you hitting on my wife? Bastards? Are you calling the beloved children of Jett Adler bastards?”“Eh-what? Jett Adler? The most powerful man in the city? How is that even possible!”

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

This is a story of a man named Kim Sae-Jin, who one day, inexplicably wakes up as a Monster. Follow him and his perilous journey to get his life back as a Human, all the while growing even more versatile as a Monster in the process. This should be… complicated, somewhat.