夢幻 (Yume Maboroshi)

Background
This song was originally written for TEAM Entertainment's compilation album IA THE WORLD ～Kaze～. A cover was later featured on amu and Ten's utaite album W.H.Y. GUMI's version of the song was uploaded on niconico together with amuTen's version. It's featured on EXIT TUNES compilation album GUMity.

This song has entered the Hall of Fame.