Muryoku Seijo to Munou Oujo: Maryoku Zero de Shoukan Sareta Seijo no Isekai Kyuukoku-ki

A part-time worker named Tamura Nana is suddenly taken from her home into another world, where those who summoned her call her a saint and ask her to rescue their world. Despite being called a saint, Nana has no magical abilities. Adding to the problem, she is paired with a princess who also lacks magical skills. The journey of these two individuals, who are considered useless in their roles, begins.