kimmininnie's Manga

After being reborn into her favorite novel, she realizes that this is before the main characters are born. Well, she decides to sacrifice herself for her pregnant sister, and gets kidnapped by the villain's father, who she always had a soft spot for.
This is when she decides to change the plot of the story, so that the villain doesn't get born.
And the way to do that?
Seduce the villain's father!