Blue Sky Blue / Warera Sumaaho Shoukougun

 is the sixth single by N Zero.

Tracklist

 * 1) Blue Sky Blue
 * 2) Warera Sumaaho Shoukougun (我らスマアホ症候群)
 * 3) Blue Sky Blue (off vocal ver.)
 * 4) Warera Sumaaho Shoukougun (我らスマアホ症候群) (off vocal ver.)