Daiseijo wa Ten ni Mesarete, Panya no Gijou ni Narimashita.

Ally is a great saint with rare powers of prayer. One day, during tea time, she is nearly poisoned to death by someone. So, she decides to pretend she's dead and become a baker, something she's always dreamed of! She secretly changes jobs and becomes an apprentice, hiding her true identity. But then she discovers that the baker's son is actually her former royal guard!?

(Source: ComicWalker, translated)