Three specials released with DVD volume 9 of the TV series.

Episode 1: The Day of Gathering
Past event about Chalce and Chrome's group, of how the three youngest members came to join them.

Episode 2: White Footmarks
Past event about Chalce transfer into Cluster E.A, his meeting with Hema and how he elicted the hatred from the competitive Vesuvia.

Episode 3: Wings of Freedom
A strange girl appears in Cluster E A, looking for Fon. Is she there for a visit or something else? Will she find her answer amongst Fon and his friends?

[Source: Wikipedia]