Kirawaremono no Koushaku Reijou.

"Aim for a commoner life! I will spend my time as a commoner without getting a fiancée at the school!!"

At the first party she attended when she was little, she was labeled as a "villain daughter" by a noble woman, Luise. She is the daughter of the Duke of Otilie, who has become isolated in aristocratic society. While hated by those around her, she made her own efforts, but her time passed without being rewarded. While enduring such a difficult situation for her, Otilie decided to enroll in a school where royalty and aristocrats gathered...

(Source: Kasakura Shuppansha, translated)