Zaregoto - Volume 1 Chapter 1: Savant Blue (Part 1)

When she reborn, she finally understood; men can never be relied on.
That being the case, she can only rely on herself to win, that
splendid brilliance she yearned for, in this lifetime.

To my scheming Stepmother and ruthless sister, I will
destroy all your backings, pull off your wings, and step on your
arrogance! As for Grandmother whom speaks kindly but has a snake-like heart,
and a father who is hypocritical and exploits advantages; I will tear
off your pretense and cut off your hope! Let’s see how you can still
scheme against me!

Witness her splendid fight against her stepmother, punish scum men,
and create havoc in the imperial court, as she soars with the wind and
rises above the water!

But as for that man who still stands! How dare he play with my heart?

- Description from Novelupdates

“Like it or not, you'll still be my woman, Gina,” Massimo said coldly, undeniably. “Everything is written in the agreement your grandfather and my grandfather made.”“I'm not part of the Sanders family anymore, so I'm not obligated to fulfill that agreement.” Gina answered loudly without any fear.Massimo laughed out loud. “So you rejected me?”“Of course!”“Fine, then I'll make the only person you love live in a miserable state. I will make him wish death was better than his current life,” Massimo threatened earnestly.Synopsis:Gina, who was born to a woman whose existence was not recognized by her father's family, was forced to find her father in Barcelona on the orders of her mother who died of cancer.Living with her mother and stepsisters did not make Gina's life any better, the stepmother who was after her father's property justified everything to make her beloved son Diego Alvarez the heir to the Sanders family. Meanwhile, Gina must be trapped in a crazy agreement made by her grandfather decades ago to become the heiress of the ruler of Barcelona Massimo del Cano who does not want marriage, Gina becomes a substitute for her step-sister for what her stepmother set her up for.The relationship that Massimo wanted was nothing more than a master and slave relationship, could Gina survive in that relationship? The terrible relationship of a man who turns out to be his first love.

I’ve reincarnated as the reverse harem game’s villainess, the one and only step-daughter of the Eckart duke family.

Madeline Celeste d'Aumont is the first daughter of Duke Aumont and Duchess Louise-Marie d'Aumont who has been engaged to the Second Prince of Pays Des Abrutis since she was a child. The Second Prince decided to marry a woman closer to his own age and broke off the engagement to Madeline who was left with a broken heart and a reputation as being an unwanted woman even before she was an adult. The Duke decided to help his daughter regain her confidence and reputation by sending her to the Academy de L'échec.

Ito Aoi was the son of a Kendo master who ran a dojo in downtown Tokyo. One day while crossing the street to get some Yakitori, Aoi was hit by a delivery truck and woke up as the trash first son of Duke Montfort, Guy de Montfort. Duke Montfort also sent his son to Academy de L'échec only Aoi instantly recognized that he was now living in the world of an Otome Game that his sister loved to play and talk about all the time. Aoi recognizes that Madeline is the villain from the game. Aoi also recalled his sister saying that Madeline was terrible in the game, but is she really?