Proof / no vain

 is the second single by MELL.

Single Information
Proof was used as the first ending theme for the anime Hayate no Gotoku!.
 * All Lyrics: MELL
 * All Composition/Arrangement: Takase Kazuya

CD

 * 1) Proof
 * 2) no vain
 * 3) Proof -instrumental-
 * 4) no vain -instrumental-

Limited Edition DVD

 * 1) no vain Promotion Video