Detective Conan: Death Note - Chapter 85: How can an adult really compete with a high school student?

A data loving young man from Earth has an accident which transports him to a dark land filled with terrifying creatures and magical powers. Fortunately for him, he has a Biological Assistance Chip to ease his path. However, things in this bizarre and strange world are not always as they seem, and, though it is a tremendous asset, the chip doesn’t always work as expected. With all of the crazy creatures and magical mayhem around him, one can only wonder what the future holds for this young man…

- Description from novelupdates

You thought being reincarnated as an extra-side character was bad? Imagine being thrown into the body of a villain who is disowned by his own family and discarded by the author.

To exact revenge on her fiance who cheated on her, Xing Shu plotted against her fiance’s uncle, Cheng Lang. “Was my nephew unable to please you?”

On a large, messy bed, Cheng Lang pinched Xing Shu’s chin. The black Buddhist bracelet around his wrist swayed from side to side. Everyone said Cheng Lang was a religious man who stayed away from women.

However, after sleeping with him for a night, Xing Shu expressed how it was actually easy to manipulate him. She only needed to say sweet things to him in a soft, gentle voice, and he’d give her anything she wanted.

“Mr. Cheng is only putting on a show with Xing Shu. He’ll dump her very soon!”

“Xing Shu is a shameless woman. Mr. Cheng would never fall for someone with ulterior motives like her!”

Everyone in Jing City waited for her to make a fool of herself, but nobody knew how Cheng Lang pinned her against the bed at night. “Xing Shu, mention getting a divorce again if you dare.”

Ever since then, Cheng Lang, a man who once belonged on the altar, was brought down by Xing Shu. He experienced what it felt like to be in a relationship like a normal person, and he found joy in it.

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