Unnamed world

 is the seventh single by Hirano Aya. It was released on April 23, 2008, and peaked at #20 on the Oricon single chart.

Single Information
Unnamed world was used as the ending theme for the anime Nijuu Mensou no Musume.
 * Lyrics: Hata Aki (#1), Hirano Aya (#2)
 * All Composition: Kurosu Katsuhiko
 * Arrangement: Kurosu Katsuhiko (all), nishi-ken (#1)

Tracklist

 * 1) Unnamed world
 * 2) Maybe I can't good-bye.
 * 3) Unnamed world (off vocal)
 * 4) Maybe I can't good-bye. (off vocal)