Marianne Allen is unperturbed by the broken engagement.

Mariane of Count Alan's house and her grandfather Raymond, the previous head of the family, are talking together. "Mariane, your engagement to the Second Prince has been broken off." "Is that so, Grandfather?" For a noblewoman, a broken engagement would be a serious matter, but Mariane showed no signs of distress whatsoever. Even though the Second Prince's next fiancée would be her half-sister. --- Addendum: I have made changes to the title following some suggestions I received. ／ This is also posted on Kakuyomu and Pixiv.