Hagane no Yuuki

 is a single by STARMARIE.

Tracklist

 * 1) Hagane no Yuuki (ハガネの勇気)
 * 2) Yume no Tobira (夢のトビラ) (Starmarie ver.)
 * 3) Hagane no Yuuki (ハガネの勇気) -Instrumental-
 * 4) Yume no Tobira (夢のトビラ) (Starmarie ver.) -Instrumental-