Being the fairest flower in the garden of Ceredia, as the poets called her, you would think Keiko Uesugi had a charmed life.
You would be wrong. She had to prove her mettle every day, because no one would believe that such a cute girl is a fearsome fighter.

To make things worse, Vindicus, her Obsidian Broadsword, is possessed by a pervert demon who constantly teases her.