Read manga I Became The Older Sister of A Regretful Male Lead on teenmanhua.com

After accumulating all kinds of karma, she possessed the male lead sister's body.

According to the original, she will die from an incurable disease and give her the opportunity to travel through space. Those are the details about this character...

After reading through the original, she knew how to cure that disease. All it takes is physical contact with someone with superior divine power.

And the one with that overwhelming divine power was Karlne, the 3rd prince of the empire, and also the older brother of the heroine.

For that reason, she decided to find a way to make physical contact with him. And that way is a contract marriage.

"Anytime you feel my family is valuable, you are free to use it, prince."

"Don't dream of marrying me for real."

The heroine's brother was tougher than she thought, but whatever. Thanks to his superior divine power, she could cure the disease just by holding his hand.

Well, now that there is a cure for this disease, it is time for her to strive for a peaceful life.

"Yes...you were never sarcastic!"

"K-Karlne is a good person"

She always had to use the mask of a pitiful lover when facing him.

"It's all the lady's plan, not a coincidence, right?"

"Ah...do I need to answer?"

Sometimes she also uses the mask of evil and the day this marriage breaks up has come. But...

"...It's my fault for trying to take advantage of you. How do I make you forgive me?"

The male lead brother begs her forgiveness and holds her back. No, you used him as a cure too...

Why would he say such regretful words...
https://teenmanhua.com/manga/i-became-the-older-sister-of-a-regretful-male-lead