Heishistar's Manga

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?

In a fantasy novel, I possessed the hidden younger sister of the Male Lead, ‘Astel’.
While my brother Cassian is struggling for the revenge of the family, it’s my job to find and deal with the final Villain that has not been revealed even at the end of the original novel!!!
In order to do that, I must first enter the Northern Duke Castle, where the family’s traitors are hiding.
Somehow, I became an “imprint of companion” of Duke Anais, a beast of beast and a leading candidate for the final villain.
Besides……
“Please kiss me now, Astel.”
In order to live, you’re required to have a daily skinship with your ‘imprint partner’.
There was no such thing in the contents of the original story!
“Shall we go see your favorite sea today?”
“I……I don’t think I can. I have to meet Sir Cassian today.”
The Duke gritted his teeth with a cold face. I was slightly scared as I saw him. Maybe he’s teething? Because he’s a wild beast!
* * *
One day, after I received the Duke’s favor and consideration. My older brother Cassian left his son to me for a while.
However, the Duke seems to have made a huge misunderstanding.
“It will become our child.”
“What……?”
“Cassian Gray will disappear from this world now, so you will not become his bride.”
Yes……?
When did I become Cassian Gray’s bride, aren’t we relatives?
? ??? ? ??????,??? / Duke, that man is my real brother

After dying in a mysterious accident, Eisel reincarnated in another world. A strangely familiar name and events heard from various places made Eisel realize that this is a world in a book. Eisel collects clues one by one and traces which book the world has been deceived. But, what is the world in the epic fantasy novel where destruction is just around the corner?!
Let’s fill up some warehouses with canteen sales and save the empire from destruction, so let’s live for a while! But then, she didn’t know that she would keep getting involved with this guy by saving the life of a young man once…
The Male Lead Is In Charge Of The Successor