Shinimodori no Sachiusu Reijou, Konse dewa Saikyou Last Boss Oniisama ni Dekiai saretemasu

Pixiv Comic
Shame the Duke". I never thought of you as my sister."
The duke's daughter, Ortancia, was abandoned by her only family-in-law Gerard and executed for innocent charges.
The moment she was executed, she realized she was back in her childhood! No way... Ortancia tries to get along with her brother-in-law in order to survive.
But somehow, my brother-in-law's love is heavy!? Doting fantasy opens for the second time in your life!

https://www.cmoa.jp/title/254173/