BTOB-BLUE made their debut on September 19th.

The unit consists of BTOB’s gifted vocal line members Eunkwang, Changsub, Hyunsik, and Sungjae! Cube Entertainment first revealed the news of a sub-unit project not too long ago with a teaser image via their various social media sites.

The four members debuted as BTOB-BLUE with their first digital single ‘Stand By Me’! “Stand By Me” was put together by popular South Korean music producers / song-writing team Black Eyed Pilseung.

It is a soft, soothing melodic ballad accompanied by beautiful harmonies created among the talent vocal line. Check out the music video for “Stand By Me” above!