 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.