 The following year, he got another leading role as Eddie Birdlace in "Dogfight".His last musical project before military enlistment was "Iron Mask"

Lee Changsub was the first member to debut his own solo album called "bpm 82.5" in Japan.With the title track "At The End", this Japan debut in 2017 also marked the first part of the Piece of BTOB, showcasing monthly solo releases from each BTOB member.