The single "Proof/No Vain" was released by Mell on May 30, 2007. The release came out on NBCUniversal Entertainment.
- "Proof/No Vain" was Mell's first single released by NBCUniversal Entertainment.
- "Proof/No Vain" was the opening theme song for the anime television series "Ultraviolet: Code 044".
- "Proof/No Vain" reached number 17 on the Oricon weekly charts.
Mell is a Japanese pop singer. She released the single "Proof/No Vain" in 2007.
Tracklist
