Azumanga Daioh: The Very Short Movie(2001)

Azumanga Daiou: Gekijou Tanpen

In this short movie featuring familiar characters from Azumanga Daiou, 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: Anime News Network)