Shinikake Akuyaku Reijou no Shissou: Kaishin shitemo Muda datta node Hatsukoi no Hito ga Saratte Kuremashita

Syrena has been reborn as the villianess of an otome game. She thought she would have been at peace, unlike what the game's script dictated... But as a result of her stepsister (the heroine) breaking off her engagement, her stepmother's blunder puts Syrena's life in danger! Her first love, a home tutor named Ford, then comes to her rescue, tells her "I'm never sending you back to that home", and immediately whisks her away?! He's kind, sweet, and supportive, despite technically being having her locked up... But living with him only revived Syrena's desire for true peace and the delight she got from chasing after her dreams. So now that she has a second chance at life, she's going to bring herself happiness!

(Source: Shogakukan, translated)