4D (album)

4D is the debut studio album by South Korean girl group Billlie. It was released on December 14, 2023, by Mystic Story and distributed by Kakao Entertainment. The album features a total of nine tracks, including the title track "dang! (hocus pocus)". 4D signifies the group's expansion into a more multifaceted and imaginative world, building upon the narrative established in their previous releases. The album explores themes of dreams, reality, and the journey of self-discovery, all presented within Billlie's unique and often surreal musical style.