B1A4

B1A4 is a 5-member Korean boy group under WM Entertainment. B1A4 (비원에이포) is a South Korean boy group formed by WM Entertainment.

They made their debut with their first album, 'Let's Fly', on April 23, 2011. B1A4 stands for "be the one, all for one". It also symbolizes the members' blood types, as there is 1 member that is blood type B, and 4 that are blood type A. The group is made up of Jinyoung (the leader), CNU (Shinwoo), Sandeul, Baro, and Gongchan. They have gained a lot of attention for their talent and unique sound.