서율 – 인기 없는 노래지만
Track 01 from Single '인기 없는 노래지만'
서율 – 있지, 말야
Track 01 from Single '있지, 말야'
서율 – 섬 (Piano Ver.)
Track 02 from Single "섬"
Release Date: 2021.11.11
서율 – 빗속에서 춤을
Track 01 from Single "빗속에서 춤을"
Release Date: 2021.09.08
서율 – Christmas Time
Track 01 from Single "Christmas Time"
Release Date: 2021.12.16