According to the official Twitter account, an animated film adaptation of the mahou shoujo ONA series, 「Houkago no Pleiades」 (放課後のプレアデス), has been green-lit for production. The announcement was originally made at the Tokyo International Anime Fair 2013 event taking place this week. It is expected to premiere later this year.

The Houkago no Pleiades ONA series, which consisted of 4 episodes, first debuted on February 1st, 2011. It was a collaboration project between anime studio Gainax and car manufacturing division Subaru. A “manner” movie was also released in June of the same year.

*ONA Episode 1:

*Manner Movie:

[Source]