SmileR's first work, Melody Line is his most notable song.This song has entered the Hall of Fame. The song is featured on his first album, Melody Line(s). Wakamura's MMD PV of the song is featured on the album MI:CLIPS 01. A remix of the song called "Melody Line -Pop! Pop! Pop! Remix-" was later uploaded and is featured on Melody Line(s) and as a non-stop version in the compilation album VOCA NICO☆PARTY.