gugudan (구구단) KOREAN OST gugudan – Believe in This Moment (이 순간을 믿을게) 이 순간을 믿을게 i sunganeul mideulge “Believe in This Moment” School 2017 OST Part.1 2017.07.17 Mimi, Hana, Haebin Nayoung, Sejeong,…