lyrics were written by Jun Maeda. Five of the characters have leitmotifs, or background music theme songs—the three heroines, Kanna, and Michiru. Misuzu's theme is ; Kano's theme is ; Minagi's theme is ; Kanna's theme is ; lastly, Michiru's theme is . Of the six music tracks not used in the visual novel, but of which were included on the game's original soundtrack, the first two were failed attempts at creating a theme for Minagi. The first album, Ornithopter, came bundled with the original release of Air in September 2000. The next album was released in August 2001 as a maxi single titled "Natsukage / Nostalgia" containing a vocal version of "Natsukage", and a B-side track; both songs were sung by Lia and the rest of the single was produced by Jun Maeda. The game's original soundtrack was released in September 2002 containing two discs with 31 different tracks along with remix and instrumental versions of the opening and ending themes. A piano arrange album was released in December 2003 called Re-feel which contained five tracks from Air and five from Kanon. An EP containing original versions of the three theme songs and remixed versions of the opening and ending themes was released in May 2006 called Air Analog Collector's Edition: Tori no Uta / Farewell song. Each of the albums released for the visual novel version were released on Key's record label Key Sounds Label. The film's original soundtrack was released in March 2005 by Frontier Works. A bonus symphony CD titled Shinwa e no Izanai was released with the special edition Air film DVD on August 5, 2005. Overall, Air music has been well received, and the original soundtrack for the visual novel has met with high sales. The opening theme was involved in copyright infringement in 2005. Reception and sales According to a national ranking of how well bishōjo games sold nationally in Japan, the original Air PC release premiered at number one in the rankings. The game ranked twice at 42 in November and December 2000, at 20 in January 2001, and twice more at 42 through February 2001. The original release appeared on the charts twice more: the first in late September to early October 2001 at 26, and again in the last two weeks of May 2002, ranking in at 43. The regular edition of the Air PC release premiered at number 13,