In the Kingdom of Windbloom, Arika Yumemiya enrolls at Garderobe Academy to become an Otome—a virgin girl who is able to use a HiME (Highly-advanced Materializing Equipment) that bestows destructive abilities. Arika also wishes to find her mother who was a Meister Otome, an Otome of the highest rank responsible for being the personal bodyguard and super weapon of the specific nation they are assigned to.