Kim Yunseo, 17 years old, former YG, SM, and FNC trainee Kim Hyunhee, 17 years old, former YG trainee Oh Jieun, 15 years old, former YG trainee Lee Jiwoo, 15 years old, former YG, SM, and JYP trainee Choi Yoonjung, 16 years old, former YG, and J Planet trainee