Picking up one year after the events of Mai-Otome, Arika is now officially Windbloom's Otome. In Ares an asteroid is detected in the sky on a collision course with Earl. After a successful intervention from the Otome a Black robed figure appears and sets in motion a new battle for our heroine. This series follows Arika's search for Mashiro as well as the attempts of the otome to find the truth behind this new enemy and the more powerful slaves it commands.