소연 (LABOUM) – 닿을 듯 말 듯 (Feat. 한겸 (OMEGA X))
Track 01 from Single '결혼해YOU OST Part.3'
소연 (LABOUM) – 잘 지내고 있니
Track 01 from Single '잘 지내고 있니'
현오, 소연 (LABOUM) – 이별을 배웠어 (Always In My Heart)
Track 01 from Single "이별을 배웠어 (Always In My Heart) - high seAson"
Release Date: 2023.11.27
소연 (LABOUM) – I Feel Love
Track 01 from Single "병원선 OST Part.4"
Release Date: 2017.09.20
영재 (Youngjae), 소연 (LABOUM) – 그대와 (You & I)
Track 01 from Single "간 떨어지는 동거 OST Part.7"
Release Date: 2021.07.08
제아, 소연 (LABOUM) – 한 여름 밤의 꿈
Track 01 from Single "아이돌보컬리그 - 걸스피릿 EPISODE 08"
Release Date: 2016.09.07
소연 (LABOUM) – Cosmic Girl
Track 01 from Single "저글러스 OST Part.1"
Release Date: 2017.12.05
이준영, 소연 (LABOUM) – 사랑하자
Track 01 from Single "굿캐스팅 OST Part.3"
Release Date: 2020.05.18
소연 (LABOUM) – 당신 생각
Track 01 from Single "오월의 청춘 OST Part.4"
Release Date: 2021.05.17
소연 (LABOUM) – 사랑이 춥다
Track 01 from Single "우리집 꿀단지 OST Part.4"
Release Date: 2015.12.10
소연 (LABOUM), 유정 (LABOUM) – 사라지지 마
Track 01 from Single "이리와 안아줘 OST Part.2"
Release Date: 2018.06.06
유정 (LABOUM), 소연 (LABOUM) – The Prayer
Track 01 from Single "미얀마를 위한 평화의 노래"
Release Date: 2021.10.29
소연 (LABOUM) – Two Of Us
Track 06 from Album "Two Of Us"
Release Date: 2019.09.19
소연 (LABOUM) – 동백 아가씨
Track 03 from Single "아이돌보컬리그 - 걸스피릿 EPISODE 03"
Release Date: 2016.08.03
소연 (LABOUM), THERAY – A Moment Like This
Track 03 from Single "아이돌보컬리그 - 걸스피릿 EPISODE 10"
Release Date: 2016.09.21
소연 (LABOUM) – 다가와 늘 네 미소가
Track 01 from Single "국가대표 와이프 OST Part.1"
Release Date: 2021.11.08
소연 (LABOUM), 유정 (LABOUM) – 사라지지마
Track 02 from Album "이리와 안아줘 OST"
Release Date: 2018.09.28
소연 (LABOUM), 딘딘 (DINDIN) – 사랑일까
Track 01 from Single "복수가 돌아왔다 OST Part.6"
Release Date: 2019.01.01
영재 (GOT7), 소연 (LABOUM) – 그대와 (You & I)
Track 07 from Album "간 떨어지는 동거 OST Special"
Release Date: 2021.07.29