Rookie girl group EXID will be singing the last OST for the MBC fantasy sitcom, "Thousandth Man."

The song "Hey Boy" is the girl version of the main title song, "Hey Girl," sung by B1A4. Famous producer Shinsadong Tiger produced this song by editing and remaking the original version.

The "Thousandth Man" OST features other artists such as G.NA, Block B and others for a total of 12 tracks.

The "Thousandth Man" OST album will release online on October 11.