"Someday" is a song composed and written by member�Hyunsik, who is BTOB's 'father of music'. It's the boys' signature emotional ballad, with the rap line members writing their own rap lyrics.

SEE ALSO: [PHOTOS] BTOB express enthusiasm about finally meeting fans through 'Our Dream' fan concert tour

Cube Entertainment�revealed, "It's a song that was too good to be just a song on the album, so we decided to release it as a pre-release."

It appears Cube was right in their assessment, check out the prerelease above!