Azumanga Daiou: Gekijou Tanpen
English name: Azumanga Daioh: The Very Short Movie
Genres: Comedy
Type: Special, Episodes: 1
Aired: Dec 25, 2001
Studio: J.C.Staff
Source: 4-koma manga
Rating: PG-13 - Teens 13 or older
Synopsis:
In this short movie featuring familiar characters from Azumanga Daioh, Osaka is yet again having a strange dream of Chiyo-Chan's pigtails being posessed. As Chiyo-Chan's pigtails bounce out of the window, who knows if young Chiyo will ever be happy again.

(Source: ANN)