The band currently consists of lead vocalist and guitarist Hwang So-yoon, and bassist Park Hyun-jin.
Their name, which literally translates to 'new kids' or 'new boys', was chosen by Hwang after coming across an issue of the now-defunct children's magazine Sae So Nyeon in a bookstore.
In December 2018, Se So Neon announced Gangto and Fancy Moon had left the band to perform their military service.
[6] They were replaced by Park Hyun-jin on bass and U-su on drums, who were recruited by Hwang through a self-tape audition.
[4] In August 2022, the band announced the departure of U-su, citing his wish to continue activities as a solo drummer.