Villainess mc got a 2nd chance at life, and swore to get revenge on her cunning sister.
Poor mc became a noble due to her mother's remarriage. She grew up as a villainess, and ended in a tragedy like one. During her death, the mc realized that the sister that she bullied wasn't a saint, but a mastermind that tricked her into doing those villainous deeds. Now at death's door, she got a chance to rewind time, and the mc swore to get her revenge by getting rid of her sister's 'saint' mask. We'll see how this goes.
The Villainess Reverses the Hourglass