Wikipedia
is an anime series created by Sunrise. Directed by Masakazu Obara and written by Hiroyuki Yoshino, it is a spinoff of My-HiME anime series and as such My-Otome takes place in a new setting with new main characters.
The series originally premiered on TV Tokyo from October 6, 2005 to March 30, 2006. An OVA sequel to the series, My-Otome Zwei, has been made and released in Japan, and a prequel, My-Otome 0~S.ifr~, has been completed. The series was licensed for North American distribution by Bandai Entertainment. Zwei leaves the story open for future sequels, and Sifr for future prequels. At Otakon 2013, Funimation Entertainment had announced that they have rescued all of the My-Hime Project anime and will be re-released in 2015.
A new series was announced in June 2008, however no further information has been released. The initial announcement did not indicate whether this series would take place in the world of My-HiME or My-Otome, nor whether it would be a sequel or prequel to either series. Incomplete information indicates that this new series may in fact be Sora Kake Girl, which shares most of Otome's staff, rather than a new Otome series.
is the manga counterpart to Sunrise's My-Otome series, following a storyline different from that of the anime. It is authored by Hajime Yatate (original creator), Tatsuhito Higuchi (scenario), Hiroyuki Yoshino (scenario) and Kenetsu Satō (art). During its 44-chapter run, it was published in Akita Shoten's Shōnen Champion, with its first publication in August 2005, two months prior to the release of the anime. It is a semi-fusion of the Mai-Hime anime and manga (e.g. Haruka's element and Shizuru's knowledge of her own naginata-wielding 'dark twin' as well as Alyssa's sisterly relationship with Natsuki Kruger and the apparent romantic relationship between Viola and the latter).
In addition, there is a derivative chapter called Mai Otome Super H, centred on an onsen visit. It was published in the Champion RED magazine. As the title suggests, it has hentai content, although it is a canonical work by the original manga artist and the content is not as explicit as most H-Doujinshi. It takes place between chapter 12 and 13, but no mention is made of it in the main plot.
It is unconnected to the new My-Otome Zwei manga, which follows the anime's plot more closely.
A continuation of the original manga was released called My-Otome Arashi which introduces Archduke Nagi's younger twin sister (disguised as a man) Arashi who has purchased Garderobe and all of its students after the campus incurred repair debts from the end of the original manga during Sergay's coup turning the school into a nightclub despite the fact that Garderobe is the single most vital element to all the nations of Earl by supplying Otomes (they have supposedly been abandoned by the world).