C.N.BLUE (Korean: 씨엔블루
), stylized as CNBLUE (Code Name Blue), is a rock band from Seoul, South Korea, which debuted under F&C Entertainment
on August 19, 2009 in Japan with the band's first mini album, Now or Never
. The group released four teasers for their 1st album Bluetory
, starring one member per each of the videos in the sequence of Jonghyun, Minhyuk, Jungshin and lastly, Jung Yong Hwa on the 6th, 8th, 11th and 13 January respectively. On the January 14, CN Blue debuted their first mini-album with lead single "I'm a Loner" (Korean: 외톨이야).