EP 세우, 풀림, 쓰담, 김사사 – 파란날 (Original Ver.) Dec 7, 2021 be1lyric Track 07 from EP "Letters for You"Release Date: 2021.11.04
EP 풀림 – Us (Re:Master Ver.) Dec 7, 2021 be1lyric Track 06 from EP "Letters for You"Release Date: 2021.11.04