Mai Tokiha and her sickly younger brother, Takumi, have received a scholarship to attend the prestigious Fuuka Academy. On the way, the ferry they are travelling on becomes the site of a destructive battle between two girls wielding apparently supernatural powers - the powers of a HiME. She and others thirteen girls, each with the ability to materialize "Elements" and summon metallic guardians called "Childs" have been brought to battle mysterious creatures called Orphans. Each with a different personality and background, they must decide who they truly care about and why they fight.
Arika Yumemiya has traveled far in search of her goal: the prestigious Gualderobe Academy. This is the school where young girls are trained to become Otomes, protectors of royal leaders throughout the lands. Here, Arika makes plenty of friends, but some enemies know something about her past that she does not. Nevertheless, her spirit and determination will keep pushing her forward. --- Adapted from its predecessor, Mai-HiME, this series is not a direct sequel, but an alternate universe setting featuring some of the Mai-HiME cast (though with different personalities).
My-Otome 0~S.ifr~ (OAV) (Prequel)
This is the prequel of My-Otome, which predates the events before the My-Otome Series. In this series, it focuses upon the origins of Lena Sayers, the mother of Arika Yumemiya and former bearer of Lofty Crimson Jade / Blue Sky Sapphire GEM, and Sifr Fran, the biological mother of Nina Wang and the former queen of Windbloom Kingdom, as well as the origins of Schwartz, Aswad, and the Garderobe Academy and its Five Columns. The kidnapping of Sifr and the powerful revelation of Lena's GEM will soon fatefully determine the outcome of the future for themselves and the others around them.
My-Otome Zwei (OAV) (Sequel)
One year after the events of Mai-Otome, an asteroid on a collision course with Windbloom kingdom is destroyed—barely—by an international task force of Meister Otome. Subsequently a new and more powerful kind of Slave appears, along with a sinister black-robed entity—or entities—able to easily overpower the most powerful of Meisters. Not only this, but Arika and Mashiro's troubled relationship is hindering the use of the Sapphire of Azure Sky—possibly the one weapon powerful enough to defeat this new adversary.