Saenai Kagomochi Reijou, Kokou no Ouji-sama ni Misomerareru: Bibou no Imouto ni Iinari no Kazoku wo Sutetara, Shin no Nouryoku ga Kaika Shimashita

An unfortunate young lady blossoms with the love of a solitary prince! Sweet and frustrating, doting, and a Cinderella romance♡ Felicie, the daughter of a marquis, is blessed with the blessing of fertility. Despite being bullied by her younger sister, who has the blessing of controlling beauty, she works hard to fulfill her duties as the next lord of the domain. However, her sister's machinations take away her position as heir and her fiancé - so much for that, she decides to live on her own! Felicie studies hard at school to become a lady-in-waiting at the royal palace, but by chance she becomes the "favorite" of the brilliant third prince, Haruto! As she meets him again and again, Felicie discovers the happiness of being loved and the true value of the blessing of fertility. (Source: Gaugau, translated)