Toaru Majutsu no Index SS - Volume 1, Chapter 1: Pot with Meat and the Appetite for Great Tactics. A_Required_Thing.

Gu Changge, a noble lady from a wealthy family, is a well-known business legend in Yuncheng, going into business at 15, taking over as President of Gu Group at 18 and becoming Chairman of the family business at 30.
She is murdered by her husband Shao Tianze, just to give his mistress Gu Changle a healthy heart. But a premeditated car accident makes Gu Changge revive in a new guise and settle into an 18-year-old girl, Song Yunxuan.
The new face, young body and experienced soul become her weapons of revenge. In her struggle with the four big families in Yuncheng, can Gu Changge shrink back? Will she open her broken heart again? Can she always head off dangers in power struggles?
Let’s find out if Gu Changge can revenge herself and create glory again.

- Description from Novelupdates

Mo Ran felt that taking Chu Wanning as his master was a mistake.

Nemesis!

If Arianna had known that irritating man would change her life in the worst way possible, perhaps she would have poisoned his coffee the first day they met. Arianna who was tricked and about to be married off to a Loan shark by her uncle’s family, finally found a way to escape. However, that was all ruined when Marcel, the feared lord of the underworld captured her. The one thing she desired the most – her freedom – was taken from her.

Marcel prided on the fact that he was well feared, respected, and revered in the city. His name caved terror in the hearts of people, however, his reputation is put to test when a familiar stranger relieved him of his property right under his nose. Anger simmers in his veins as he goes on a manhunt against the pickpocket who robbed him.

When he gets Arianna, Marcel is sure to show her that nobody steals from Marcel Luciano and goes scot-free. On the other hand, Arianna loathes him so much and would do everything to escape that crazy Mafia. Unfortunately, what if she ends up stealing his heart as well. Read to find out.

~~~~~

“You’re a monster, Marcel,”

“Don’t monsters deserve to be loved too?”

*Note – this book has strong sexual themes, strong language, violence, and gore. It would leave you on the edge and get you screaming for more. So if you can’t handle the burn, drop it without abusing me in the comment box (I won’t take it lightly if it does happen). If you can handle the burn, then welcome to the Mafia world!

.....

[Shuangjie, sweet pet, white and black, happy friends, 1v1]

The majestic master of Yunran, who is proficient in medicine, poison, and martial arts, lives happily like a fairy, but once he was struck by lightning, his soul turned into the bullied eldest lady of the Shangshu Mansion, and his life is not as good as a dog…

The step-sister regretted her marriage, and directly ordered someone to knock her unconscious and throw her on the sedan chair, and marry the man who was rumored to be suffering from eye and leg diseases.

*****

On the wedding night, Nangong Mo said to her:

“This king is blind and disabled and his life is not long. I don’t want to miss the beauty. You can reconcile and find another lover.”

Yunran replied affectionately: “People in the world often say that when you get married as a husband and wife, there is no doubt about your love. Now that you and I are married, we should never leave. I will accompany you to the last moment of my life.”

However, Nangong Mo heard her voice:

[Heli? Why do you want to reconcile? Living in your house, spending your money, and when you close your eyes and kick your legs, I will dig a hole and bury you, and then inherit your wealth, rich land and beautiful family, wouldn’t it be beautiful? 】

Nangong Mo gritted his teeth slowly: “Heh… very beautiful!”

- Description from novelbuddy