 On November 17, 2004, a teaser DVD named "Air prelude" was produced containing interviews with the anime's cast, clean opening and ending theme video sequences, and promotional footage of the anime itself; it was a limited edition DVD, with only 20,000 copies produced.The anime television series is produced by Kyoto Animation, directed by Tatsuya Ishihara, written by Fumihiko Shimo, and features character design by Tomoe Aratani who based the designs on Itaru Hinoue's original concept.Thirteen episodes were produced by Kyoto Animation