아토 (ATTO) – 숨바꼭질
Track 01 from Single "6th Present"
Release Date: 2017.05.17
아토 (ATTO) – 그때의 당신이라기보다 (Vocal by 소리)
Track 01 from Single "8TH PRESENT"
Release Date: 2017.08.24
아토 (ATTO) – AIRPLANE MODE (Vocal by 한나)
Track 01 from EP "10TH PRESENT"
Release Date: 2017.12.19
아토 (ATTO) – Stay Here
Track 01 from Single "7TH PRESENT"
Release Date: 2017.06.30
아토 (ATTO) – 우리는 아직 친구 (Feat. 소리)
Track 01 from Single "9th Present"
Release Date: 2017.10.27
아토 (ATTO) – 소리결
Track 01 from Single "First Present"
Release Date: 2016.01.13
아토 (ATTO) – 연애하고싶다
Track 01 from Single "Third Present"
Release Date: 2016.08.22