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.

Grotesque, strong enemy called Siren has suddenly appeared from the sea. In order to fight against them, a group of army Azure Lane has formed. They were successful in stopping the attack from Siren for a moment using warships, the different ideals from the people who formed it has shown. The story is about girls fight the strong enemies that they never face while dealing with the trouble in each camp.

Grotesque, strong enemy called Siren has suddenly appeared from the sea. In order to fight against them, a group of army Azure Lane has formed. They were successful in stopping the attack from Siren for a moment using warships, the different ideals from the people who formed it has shown. The story is about girls fight the strong enemies that they never face while dealing with the trouble in each camp.

Animation of the Azur Lane 4-koma manga.