Maryoku ga nai to Kandou saremashita ga, Oukyuu de Seijo Hajimemasu

A Cinderella romance about unrequited love between an abandoned young lady and an unapologetic prince. Despite being the eldest daughter of a prestigious family of wizards, Yuno is disowned by her family because she cannot use magic, and ends up working as a maid at the royal palace. The master she serves is Dirk, her first love and her only source of support...!?

(Source: Kadokawa, translated)