Hip-Hop group Block B will be singing an OST for the MBC sitcom "Thousandth Man."

Block B is the fourth group to singing for this drama, after B1A4, G.NA and others.

The song, "Your Umbrella" is about promising eternal love and features a soothing melody. Block B are also avid fans of this sitcom and their soft vocals and rap will give the drama a new image.

The drama producers stated that they wanted many different genres for the OST in order to give a different vibe to the sitcom.

The song "Your Umbrella" will be available online on September 7.