벨트보이 (Belt Boy) – 별거 아냐
Track 01 from Single "별거 아냐"
Release Date: 2018.09.06
벨트보이 (Belt Boy) – Like You
Track 01 from Single "Like You"
Release Date: 2019.06.07
벨트보이 (Belt Boy) – 1st LUV (feat. 세리)
Track 01 from Single "1st LUV (feat. 세리)"
Release Date: 2019.07.09