Side-B: Memoirs of Echo Unseen
| グループ | 빌리 |
|---|---|
| リリース | 2023-10-23 |
| 種別 | single |
| タイトル曲 | Dang! (Hocus Pocus) |
Side-B: Memoirs of Echo Unseen is a single album by the K-pop group Billlie, released on October 23, 2023. The release is led by its title track "Dang! (Hocus Pocus)". Billlie debuted on November 10, 2021 under Mystic Story.