Tsuihou Joutou! Tensai Seijo no Watakushi wa, Doko de Darou to Kagayakemasu no de.

Hailed as a genius, Metea became the Chief Saint at the age of eighteen...only to be abruptly ordered into exile. Relieved to be freed from the crushing burden of singlehandedly supporting the Central Temple, she sets off on her journey with a radiant smile. Along the way, she encounters the knight Lionel, and together they travel to save those in need. Though their first meeting is anything but pleasant, the distance between them gradually begins to close. Will the mightiest exiled Saint end up saving the entire world!? An exhilarating heroic fantasy!! (Source: Kadokawa)