제로나인 – Thursday (With 안희준)
Track 01 from Single "Thursday"
Release Date: 2019.01.22
제로나인 – 좋은 아침이야 (With 김영훈)
Track 01 from Single "좋은 아침이야"
Release Date: 2018.12.21
제로나인 – 내 사랑은 아름다웠으면 했어 (With 양승욱)
Track 01 from Single "내 사랑은 아름다웠으면 했어"
Release Date: 2021.01.25
제로나인 – 이별의 순간 (With 언제)
Track 01 from Single "이별의 순간"
Release Date: 2021.08.26
제로나인 – 넌 나의 마지막 사랑 (With 안희준)
Track 01 from Single "넌 나의 마지막 사랑"
Release Date: 2021.04.26
제로나인 – You are My Melody (With 양승욱)
Track 01 from Single "You are My Melody"
Release Date: 2019.02.18
제로나인 – 너와 나의 사이 (With 신은지)
Track 01 from Single "너와 나의 사이"
Release Date: 2020.12.28
제로나인 – 좋아요 그대 (With. 안희준)
Track 01 from Single "좋아요 그대"
Release Date: 2017.01.26
제로나인 – You (With 언제)
Track 01 from Single "You"
Release Date: 2020.11.23
제로나인 – 사랑이라 말했던 것 같아 (With 유재호)
Track 01 from Single "사랑이라 말했던 것 같아"
Release Date: 2021.03.29