Pre-debut singer Gyubin released her collab projects.

According to LIVEWORKS COMPANY, Gyubin is a high school girl who turned 16 this year. She has excellent vocal, guitar, piano, composition and lyric writing skills.

Unusually for a rookie before her debut, she released three pre-debut collaboration project singles one after another with Dynamic Duo's Gaeko and Wonstein, and the band NELL's vocalist Kim Jongwan.