Rebirth Begins with Rejecting my Childhood Friend - Chapter 40 - Youran is so pitiful.

When he returned to the World of Martial Arts, the game was filled with blood and battles! Chen Kaixin had chased after the footsteps of the one emperor, two empresses, three princes, seven dukes, and thirteen aces for three years, but during the eve of the Sword Among Us tournament in Mount Hua, he was ambushed by evil bastards, and was killed so much that his level dropped to that of a newbie. He completely lost the chance to join the ranks of the powerful players in the game! In great disappointment, Kaixin quit the game and got drunk so that he could forget his sadness, but during that stormy night, Chen Kaixin found that he had actually dreamed for a total of three years, because when he woke up again, he woke up to three years ago, when he was still a student.

- Description from Novelupdates

“With my knowledge, give me a fulcrum on which to place it and I shall move the world!”

Su Ran, a music prodigy, woke up transmigrated into a book.

At that point in time, the main story arc in the book had already been completed. As a villainess female supporting character, not only did she need to take over the original owner’s pitiful life in poverty, she also gained an instant son right at his rebellious period.

Ten or so more years from then, the son would turn into a twisted, evil villain. He would appear in one of the extra chapters to pick on the male and female lead’s children.

***

Su Ran: Son, you shouldn’t be too outstanding.
Su Han: Why not?
Su Ran: ’cause you will be killed.

Su Ran: Son, would you like to learn music from me and become a zen, little fairy boy who only needs to drink dew.
Su Han: No, I want to go into business so I can support you.

- Description from Novelupdates

Yu Xinyan was a tragedy in her previous life. She grew up well, studied well, and should have a bright future, but was used by her adoptive parents to pay off her debts.

It’s okay to marry a second-married man, but she was also used by a scumbag to become a hen that doesn’t lay eggs, and she was blinded, cursed, and bullied by her stepson and stepdaughter for most of her life.

In the end, Yu Jie suffered from an incurable disease, and she didn’t wait for her husband’s greetings, but was kicked out of the house.

It happened that fate tricked people, and accidentally learned the real reason for her infertility. She wanted to be strong for a lifetime, but her life became a joke.

After rebirth, whoever loves this nanny wife should be whoever she wants.

Just as he was thinking about how to change the situation, he found a small space by chance and smiled at the golden finger given by God.

Cleanly kicked the so-called dedicated man, turned around and married the boss in the factory, who had a hard time getting a wife, and lived a sweet little life without shame or embarrassment, who knows who is happy.

- Description from novelbuddy