They originally debuted as a trio with leader Narachan, rapper Roda, and main vocalist Bitsaeon.

They employed pure Korean words as stage names: Narachan (나라찬; lit.

[8][9] The lyrics, which utilize pure Korean words, were written by the members and reference territorial dispute over the Liancourt Rocks between South Korea and Japan.

They were the first idols to film a music video on the Liancourt Rocks, a group of islets known as Dokdo in the Korean Peninsula.

[10] The profits earned from the song via online music stores were donated to "descendants of those who have made contributions to the nation".

Arena", where they plan to add six new members and form three teams with distinct genres and concepts.

[17] During Bitsaeon's absence in 2021, members Roda and Narachan both released solo songs "Anxious" and "Beautiful Sunday", respectively.