Tsuihou Sareta Seijo desu ga, Douyara Watashi ga Honmono desu Zense Kusushi wa "Iyashi" no Kusuri de Sukuitai!

Emilia, a failed saint lacking the power of healing, is banished from the capital after a true saint appears, and forced to live in the frontier! Despite constantly bickering with Logan, a handsome but foul-mouthed knight who inexplicably followed her, she uses her past life as a pharmacist to open a pharmacy... and the medicines she creates possess healing powers! Furthermore, miasma begins to erupt in the capital where the "true" saint resides...? Will the medicines I create hold the key to saving the country—!? A miraculous reversal fantasy of a discarded saint! (Source: Kadokawa, translated)