The group is composed of five members: Soram, Yuina, Sui, Sarang, and Julia.

[2] The members were revealed from February 14 to 17 (in order: Sui,[3] Sarang,[4] Soram,[5] and Yuina[6]).

[7] On March 27, the group made their debut with the released of extended play Hashtag# and the single "Good Girl".

[8] On May 9, Brave Entertainment announced that Yuina would temporarily halt her activities due to health-related issues.

In addition, Julia was added to the group on May 13 to "maintain a four-member lineup" prior to releasing new record in June.