Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 16 - 16-20. Sania Kingdom

“I swear I will make them pay with everything I have. I will use my very own blood to sign the documents that will end them if I must!”To Champagne Gold, life was always like a fast-moving truck with no brakes and a drunk driver, one she couldn't avoid.At the age of five, she lost her parents in a helicopter crash. Life after that was one problem to another but she held on... until her grandfather passed away as well.With his death came the loss of her position of CEO and her hard-earned shares. As if that was not enough, she was served with divorce papers and the revelation of her husband's adultery with her cousin.Dealt with one too many blows, Champagne sought to end it all. Perhaps she could be reincarnated or whisked away to another world like the books she read before, but that was not to be. Instead, a mysterious man entered her life.“Rather than escape like a coward, I can give you the power and resources to carry out your revenge. I have but one condition―marry me.”Champagne held her lips between her teeth and took the offer.However, just when she believed her new life was going smoothly, she found out another painful secret. One more painful than any she had discovered before.She had undergone a uterus removal procedure and she didn't even know it.Now Champagne is more determined than ever to get revenge on everyone who wronged her. She would do and give everything to make them pay for taking away something so precious from her.

Gu Jin crossed into a novel as the supporting character and best friend of the main female lead, Cheng Xin.

Cheng Xin was frequently surrounded by men of status and quality. As Gu Jin was the female lead’s dearest friend, she doesn’t mind settling for the leftover meager soup if the female lead chose to eat the meat. The two sisters believed they’d enjoy this friendship for a lifetime.

But just as she was ready to latch firmly unto Cheng Xin’s golden thigh, she discovered the body she crossed into had memories of future events beyond the novel’s plot, finding out that her marriage would end in utter failure.

The female lead, Cheng Xin who often quarrelled with the male protagonist would head over to Shao Chong for comfort even though Shao Chong was married to Gu Jin. And after several incidences, Gu Jin advised Shao Chong to have a sense of propriety as her spouse but he told her not to think too much about it, claiming that he only maintained a pure friendship with Cheng Xin.

On the day Gu Jin was kidnapped, her good husband stayed by her cousin’s side and accompanied her to the hospital.

When Gu Jin transmigrated into this new world and learned of the truth, she did not wish to waste this new life as a supporting role for her cousin as the previous soul had done. She’d not live a life as a spectator in someone else’s love story. No. She would be the protagonist of her own romance in this new life.

- Description from Novelupdates

Hikaru Nozomi, an ordinary university student, gets recruited by the Order of the Elements after awakening the Element of Light. And his mission? To find the other 9 Elements.

Hua Baihe is an emotional mediator, relying on his own mouth to persuade many pairs of broken pots that deserve to be together.
until selected by the emotion system.

before crossing.
She vowed to slap the small flat chest with a bang: “As long as there is a reward, there are no couples that I can’t persuade!”
System: “Do well, little girl.”

After crossing.
Hua Baihe looked at the man above him with a look of horror: “…No, this really won’t work for me!”
The system prompts: “The host is not allowed to fall in love with the target character.”

The man’s kiss fell.
Hua Baihe: “The system, listen to me, I was forced, and you asked me to do it.”
System: “…” I didn’t let you be the protagonist!

Edible instructions:
1. Decline to pick up the list! ! ! !
2. Easy and mindless bullshit, attack and accept are decided by the first time.
3. The CP in this article is always the same person, and all CPs are willing to be together! Occasionally a little fun! Don’t take it seriously!
4. I can accept only watching the first two worlds and complaining about another heroine, but I suggest to keep reading. The author does not write brainless logic. Of course, I suggest that I can’t stand the upper right corner. Generally speaking, I accept peaceful discussions, but scold me. I’ll kill you, I hope you know.

- Description from novelbuddy