Proof/No Vain

"Proof/No Vain" is Mell's second single under Geneon Entertainment. "Proof" was used as the first ending theme for the anime series Hayate no Gotoku!. The single reached number 18 in the Oricon charts and sold a total of 13,000 copies.^[1]

"Proof/No Vain"
Single by Mell
Released	May 30, 2007
Recorded	2007
Genre	J-Pop
Length	23:06
Label	Geneon
Songwriter(s)	Mell, Kazuya Takase (both songs)
Producer(s)	I've Sound
Mell singles chronology
"Red Fraction" (2006) "Proof/No Vain" (2007) "Virgin's High!/Kicks!" (2007)

Track listing

No.	Title	Lyrics	Music	Length
1.	"Proof"	Mell	Kazuya Takase	5:33
2.	"no vain"	Mell	Kazuya Takase	6:00
3.	"Proof -Instrumental-"			5:33
4.	"no vain -Instrumental-"			5:58
Total length:				23:04