Moto, Ochikobore Koushaku Reijou desu. The Comic

Claire, a daughter of the esteemed duke, is faced with a sudden annulment of her engagement to Prince Asbert, the Prince of the great Kingdom of Noston. Being scorned as the fallen duke's daughter and labeled as the villainess, Claire leaves everything behind and heads towards a new place in order to gain her true self back.

(Source: Shousetsuka ni Narou, translated)