Heishistar's Manga

The main character, who worked every day like a corporate slave, woke up one day to find herself as "Lady Christina," a noble lady of another world. According to the memories she inherited from her new body, Christina was an evil woman riddled with red flags! Warned by the prince that this is her last chance to redeem herself, she is even forced to live with the duke's son to prevent her from causing any more harm. The duke's son is seeking an excuse to execute her, so Christina resolves to work hard to avoid further tarnishing her reputation. However, it appears there are other reasons why he wants to keep a close watch on her... Immerse yourself in the romantic fantasy between a former villainess, who has committed every conceivable sin, and the vigilant duke who has his eyes on her!

An orphan in real life one day wakes up as a main character in a novel she was reading. An orphan in the novel as well, she is adopted by a villainous family who served as the main adversary against the main character in the original plot... except, the family seems way nicer than she expected. Are these really the same villains that caused so much pain the novel?

Song Ji Hyeon is a surgeon, as well as a genius doctor appointed as the youngest lecturer at Seoul University. She carries memories of a previous life as Elise De Clorence who lived as a wicked woman. Suddenly an unexpected accident occurs and when she wakes up, she's back in her previous life?! Will Elise be able to correct her past mistakes?"

I’ve gone into the body of ‘Ninaina’, the weakest character, who was fated to die once winter came! With such with weak stamina that it’s hard to even take walks, eat, or just stand, let alone exercise, I have such a tragic life that I even have to endure assassination attempts from my grandfather… “I will definitely recover my health!” “Kaiser” who comes to Ninaina’s side with a cold gaze. Receiving the order that he has to keep Ninaina alive, he comes to her side and protects her. “You will not die. For now.”

In this novel, my favorite character died.
After being rejected by the female lead and losing his emotions, he could no longer use his abilities,
and as he became weak, the North collapsed.
Even his body was never to be found,
but the novel only depicted the happy ending of the protagonists.

And I possessed the body of the villainess "Schuer" from that novel.

"Rather, I'll make him regain his emotions before he meets the female lead."

Thus, I left for the North.

"Grand Duke, can you hold my hand just once?
Or maybe a signature. I'll keep it as a heirloom."
"If you want my signature, you too should sign and stamp here, my Lady."
"What's this?"
"A marriage certificate."

Huh?

"You can just act you usually do.
It seems like your behavior is
is somewhat getting on my nerves."

...Did I win the jackpot?