A post made on the official Facebook page indicated that Magical Suite Prism Nana will be an OVA. While the exact premiere date is currently unknown, the OVA is expected to be released this year. More information will be announced at Comiket, to be held August 14–16.
Studio Shaft will be animating the OVA, with Kantoku (Hentai Ouji to Warawanai Neko.) in charge of the original character designs. The anime is about a trio of girls that includes Kotone Oribe, Itaru Washioka, and Asuka Asagi. Taking place in Nanagoo City, the story will present their growth to adulthood with unique possibilities.
The Magical Suite Prism Nana project was initially announced in August 2012, with a series of character designs. Seven PVs were subsequently uploaded to the series' YouTube account; the third is included below.
Update August 18
It was announced that the OVA will consist of seven episodes, where each episode is directed by a different director. The announcement did not state who will be working on the episodes. It was also announced that Chika Anzai (Hitsugi no Chaika) will be cast as Mako Hiiragi, and Daisy × Daisy (Fairy Tail) will perform the music.