"Side-B : Memoirs of Echo Unseen" (stylized as "side-B : memoirs of echo unseen") is the first single album by Billlie. It was released on October 23, 2023 with "Dang! (Hocus Pocus)" serving as the single's title track.
Members Suhyeon and Moon Sua were unable to participate in recording and promotions due to them being on hiatus at the time since June and September respectively, due to health reasons.[1][2]
The physical album comes in two versions: Blue and Violet.
On September 18, 2023, it was announced that Billlie would be releasing a new album in October.[3] On September 23, it was announced that they will be releasing their first single album "Side-B : Memoirs of Echo Unseen" on October 23, 2023. They also will be pre-release "BYOB (bring your own best friend)" on September 27.[4]
_MV_Hits_11_Million_Views_YT_(October_25,_2023).png "Billlie Dang! (Hocus Pocus) MV Hits 11 Million Views YT (October 25, 2023).png (2.17 MB)")