Inchiki Seijo to Iwareta node, Kuni wo Dete Nonbiri Kurasou to Omoimasu

Frémea is the saint of the kingdom of Justitia, which only comes along once every hundred years. As the kingdom's saint, she has very little freedom, and in the company of her faithful knight, Roland, she heals the people of all the evils that afflicts them. One day, there is a rumor that Fréméa is an usurper. She is then banished from the kingdom. However, a new life full of freedom is now open to her, along with her protector Roland, who is the only one to believe in the young woman.

(Source: Mag Garden, translated)