Untouchable's Sleepy to release his first ever solo single 'F/W'!

'F/W' is short for 'First Warm Up,' and Sleepy's album is produced by Primary. Also, Baek Ah Yeon will be featured in 'F/W while rapper Basick in one of the album's songs.

'F/W' will be released on different music portals on October 20 midnight.