B1A4, named for the fact that they had 4 blood type A members and 1 blood type B member, is a boy group that debuted in 2011 under WM Entertainment. in 2018 two of the members had their contracts expired and they decided to leave the group. The group now promotes with 3 members.

2011

• O.K.
• Beautiful Target
• My Love

2012

• Baby I’m Sorry
• Baby Good Night
• Because of You
• Tried to Walk

2013

• Starlight Song
• What’s Happening?

2014

• Lonely
• Solo Day
• A Glass of Water

2015

• Sweet Girl
• You Are A Girl I Am A Boy

2016

• A Lie
• Nightmare
• Melancholy

2017

• Blue Moon
• Rollin’