SIM2 – Chillin (With 여유정, Maguro)
Track 01 from Single "Chillin"
Release Date: 2021.03.28
SIM2 – 사랑은 어려워! (With 하웅)
Track 01 from Single "사랑은 어려워!"
Release Date: 2021.04.02
SIM2 – 아까워 (With 타미즈, hrhr#06, 임다이)
Track 01 from Single "아까워"
Release Date: 2021.04.17
SIM2 – Pure (With Lokid)
Track 01 from Single "Pure"
Release Date: 2021.05.04
SIM2 – Regret (With. Claire Hau, Maguro, 에이로우)
Track 01 from Single "Regret"
Release Date: 2021.05.19
SIM2 – Buzzed (With. Maguro, 강다나)
Track 01 from Single "Buzzed"
Release Date: 2021.06.09
SIM2 – 내게 하는 말 (With 강다나)
Track 01 from Single "내게 하는 말"
Release Date: 2021.06.16
SIM2 – Right (With. Lokid, 여유정)
Track 01 from Single "Right"
Release Date: 2021.07.07
SIM2 – 소나기 (With 타미즈)
Track 02 from Single "Where"
Release Date: 2021.07.28
SIM2 – Where (With 타미즈, 태비)
Track 01 from Single "Where"
Release Date: 2021.07.28