Haru no Ashioto The Movie: Ourin Dakkan
Japanese title: はるのあしおと The Movie - 桜鈴奪還
Alternative titles: Recapture Ourin Gakuen, Footsteps of Spring
Type: OVA
Source: Visual novel
Episodes: 1
Status: Finished Airing
Aired: Mar 31, 2006
Duration: 20 min
Rating: PG-13 - Teens 13 or older
Studios: Asahi Production
Genres: Action, Comedy
Themes: School

One day the else so peaceful mood in the Ourin Gakuen suddenly changes. Kusunoki-sensei, the so-called subheroine, along with most of the students takes over the school after a coup d'état. The principal is beaten and now it`s up to Yuu Sakurano, Yuzuki Kaede and Nagomi Fujikura to take back the school from her and return it to the former peaceful days. 

This is the start of a full-scale war, one that this school has never seen before. 

(Source: ANN)