Holy maidens protect the world from "Impurities," monsters born from negative emotions in people.
Rena Retalie trains hard every day to become a holy maiden, but her powers are weak.
She feels like a failure, and now that her training is completed, she's been dispatched to the boonies.
Her family is so disappointed in her, they don't even care about her anymore...
Rena feels all alone until one day, she meets the knight-to-be Yulie who's also at the bottom of his class.
He volunteers to be her personal knight, saving her from having to team up with a total stranger.
Both nervous and excited, the two head off on their journey, but things are harder than they thought they'd be...!!