Mai-Otome Zwei
English title: My-Otome Zwei
Japanese title: 舞-乙HiME ZWEI
Alternative titles: My Otome Zwei
Type: OVA
Source: Original
Episodes: 4
Status: Finished Airing
Aired: Nov 24, 2006 to Aug 24, 2007
Duration: 27 min per ep
Rating: R+ - Mild Nudity
Studios: Sunrise
Producers: Bandai Visual, Lantis
Licensors: Funimation, Bandai Entertainment
Genres: Action

My-Otome Zwei takes place one year after the events of My-Otome. Arika is now a full-fledged Otome (though still under the tutelage of Miss Maria) and Nagi is incarcerated in a prison somewhere in Aries. The various nations are at peace with one another and plan to hold S.O.L.T. (Strategic Otome Limitation Talks) to discuss limiting the numbers of Otome.

A mission to destroy a meteor threatening to collide with Earl sets into motion a chain of events which result in a mysterious shadowy figure attacking Garderobe and several Otome as well as a new, more powerful version of Slave appearing across the planet. To make matters worse, Queen Mashiro disappears following an argument with Arika. The series follows Arika's search for Mashiro as well as Garderobe's attempts to uncover the truth behind the shadowy figure.

(Source: Wikipedia)