Years before the events of Mai-Otome
, there was a secret princess who would one day become the queen of Windbloom. Because members of the royal Windbloom bloodline can unlock the hidden powers of the old technology, Sifr Fran
is pursued by Aswad and Schwarz, and even the Meister Otomes of Garderobe are under orders to kill her if she falls into enemy hands. Meister Otome Lena Sayers
and her Otome friends must disobey orders if they are to save Sifr, but first Lena must release her true HiME powers with the help of the Blue Sky Saphire gem.