DamePri Anime Caravan(2018)

Dame×Prince ANIME CARAVAN

The story follows Ani, a princess from the minor nation of Inako. Ani is sent to the signing ceremony that will bring peace to the rival nations of Mildonia, a mighty military country, and Selenfalen, a powerful theocracy. Ani is supposed to help steer the signing ceremony along, but she runs into trouble when she encounters a handful of obstinate princes.

(Source: Crunchyroll)