Kateikyoushi no Ouji-sama: Seiryaku Kekkon ka to Omottara, Naze ka Dekiaisarete Shimaimashita

Lawrence was raised as a prince despite being a woman, but was suddenly told by the king that she must live as a princess because of a political marriage. The king has prepared a group of tutors to train her to act like a proper lady.

(Source: weavin, translated)