Mirror of the Past; The Villainess' True End
She was made a villainess and died in the guillotine while staring back at the only man she loves holding the woman who made her appear wicked, hiding a victorious smile behind her weakened facade.
"If there's a world parallel to us like I always believed, I prayed that she won't love you like I do. Loving you wasn't a mistake. But chasing you until there's nothing left of me, was." Her last thought before she died.
And when she thought it was over, she woke up to a different world, where magic, monsters, and knights were only a work of fiction.
Bewildered, she saw a scattered drafts of papers beneath her bed just to be even more surprised upon reading the exact thing that happened to her before she died. And in the blink of an eye, unknown memories flash before her, making her feel bitterness when she realizes that the author of the life, she had was none other than the person her soul transferred to.
"So even in this life, you devoted yourself to him."
"But I won't do it again."