The Saint's Magic Power Is Omnipotent - S01

The king of Slantania has officially named Sei Takanashi the Holy Saint, an all-powerful maiden summoned from another world to save the kingdom. After months of endless battles against monsters, Sei can finally rest and keep studying at the Medicinal Flora Research Institute. Her bond with Albert Hawke, commander of the Third Order of Knights, slowly deepens, but her unmarried status draws attention from other men, which frustrates Albert. Meanwhile, Tenyuu, one of many princes from the distant Zaidera Empire, has shown interest in Slantania and its potent healing potions. Since Sei's identity is a state secret, she has to stay out of sight in the royal palace until Tenyuu finishes his visit to the institute and goes back home. Despite his plain appearance, the foreign prince is no fool. He has a clear reason for coming to Slantania, and Sei's rare abilities might be the key to his puzzling research.