B1A4, who just released their album 'WHO AM I' have revealed some stories and express their thoughts for their comeback. During the interview from Loen's CSI (Comeback Special Interview), the members teach some point dances from their new choreography and their favorite lines form the lyrics.

Gongchan and Sandeul even display their photography skills. There are members who literally tried to be lonely to get the emotion from their title track 'Lonely'. They also revealed that there's a nude photo of one member that can be rated 19 on their album.

Watch the video below and know some of their revelations: