Rachel Jean wa Odoranai

Rachel, the second daughter of a viscount family, is a plain and reclusive young lady whose only interests are handicrafts and magic. She never wished for marriage in the slightest—yet when she attended her debutante ball in a magically modified dress adorned with elaborate enchantments, she ended up receiving a proposal from the court magician, Zoid! He is the most powerful magician in the country, possessing status, authority, and stunning looks—and has turned down every marriage proposal until now. So why would someone like him propose to someone like her?

(Source: Ichijinsha, translated)