9991 – 왜 떠나가는 거니
Track 01 from Single "왜 떠나가는 거니"
Release Date: 2018.05.28
9991 – 이별 후유증
Track 01 from Single "이별 후유증"
Release Date: 2017.10.27
9991 – 두말하면 잔소리
Track 01 from Single "두말하면 잔소리"
Release Date: 2017.01.05
9991 – 너는 왜
Track 01 from Single "너는 왜"
Release Date: 2018.01.15
9991 – 이대로 좋다
Track 01 from Single "이대로 좋다"
Release Date: 2017.03.03
9991 – 바람이 불면
Track 01 from Single "바람이 불면"
Release Date: 2018.02.08
9991 – 적어도 너와 같은
Track 01 from Single "적어도 너와 같은"
Release Date: 2017.07.03
9991 – 나도 이런 내가 싫어
Track 01 from Single "나도 이런 내가 싫어"
Release Date: 2017.04.20
9991 – 끝나지 않은 이야기
Track 01 from Single "끝나지 않은 이야기"
Release Date: 2017.08.14
9991 – 내게 와줘
Track 01 from Single "내게 와줘"
Release Date: 2018.03.15
9991 – 떠난 시 이별 분
Track 01 from Single "떠난 시 이별 분"
Release Date: 2017.12.13
9991 – I’ll Be There For You
Track 01 from Single "I'll Be There For You"
Release Date: 2017.04.04
9991 – 이상하고 아름다운
Track 01 from Single "이상하고 아름다운"
Release Date: 2017.06.16
9991 – 꽉 안아주기
Track 01 from Single "꽉 안아주기"
Release Date: 2017.02.24
9991 – 죽을 것 같아 사실 나는
Track 01 from Single "죽을 것 같아 사실 나는"
Release Date: 2017.08.16
9991 – 거짓말 하지마
Track 01 from Single "거짓말 하지마"
Release Date: 2017.02.01
9991 – With You
Track 01 from Single "With You"
Release Date: 2017.06.01
9991 – 12월의 어느날에
Track 01 from Single "12월의 어느날에"
Release Date: 2017.01.13
9991 – 사람이 어떻게 그래
Track 01 from Single "사람이 어떻게 그래"
Release Date: 2017.09.29
9991 – 내가 아는 당신은
Track 01 from Single "내가 아는 당신은"
Release Date: 2017.11.24
9991 – 조각난 시간을
Track 01 from Single "조각난 시간을"
Release Date: 2018.04.16