A Vocaloid song by *Luna with several versions featuring different singers.
Original ver. featuring Flower (Vocaloid), featured in the album "Kimi Dake ga Inai Natsu" (君だけがいない夏)
Acoustic ver. featuring Hatsune Miku.
Yuaru's version featured in the album "Lazurite no Yume" (ラズライトの夢)