Kokugai Tsuihou sareta Oujo wa, Tekikoku no Koori no Ou ni Dekiai sareru

Joju, the first princess of the powerful nation of Dolman, lost the battle for the throne and was branded with the stigma of murdering her stepmother. Her punishment was de facto banishment, in the form of marriage to Emilion, the king of the small, remote country of Ronino. Although Joju was rumored to be a villain, her natural intelligence endeared her to the people of Ronino, and Emilion gradually began to accept her. A Cinderella romance that carves out destiny begins!

(Source: Comic Walker, translated)