Soukyuu no Hata

 is the 15th single by Yoshioka Aika.

Tracklist

 * 1) Soukyuu no Hata (蒼穹ノ旗)
 * 2) Yuzuki (優月)
 * 3) Soukyuu no Hata (蒼穹ノ旗) (Instrumental)
 * 4) Yuzuki (優月) (Instrumental)