RB4 (알비포) – 난 널, 넌 날
Track 01 from Single "어쩌다 가족 OST Part.14"
Release Date: 2021.06.03
RB4 (알비포) – 둘이서
Track 01 from Single "찬란한 내 인생 OST Part.5"
Release Date: 2020.10.23
RB4 (알비포) – 난 널, 넌 날
Track 15 from Album "어쩌다 가족 OST Special Album"
Release Date: 2021.09.04