Idol group B1A4 has participated in the OST for MBC's new fantasy drama, 'The Thousandth Man'.

The boys have lent their voices to sing "Hey Girl", the main track for the drama written by Jihoon and composed by both One Shot's�Park Sung Ho and Oh Chang Hoon.

"Hey Girl" has a fresh and upbeat rhythm, which the boys managed to pull off with their unique musical colors, raising expectations for the soundtracks to follow.

Check it out below!



[Updated with full song]

Source & Image : OSEN
Audio Tip: Jae