The striking poster for chapter two teases Billlie’s upcoming release, featuring 12 tracks with member participation. (Photo / Mystic Story)
Billlie has begun its comeback rollout with the release of the tracklist for its first full-length album, signaling a major step in the group’s expanding musical narrative.
On April 17, Billlie (Siyoon, Sheon, Tsuki, Moon Sua, Haram, Suhyeon, and Haruna) unveiled the “OVERTURE” tracklist image for the collective soul and unconscious: chapter two through official social media channels. The visual featured a transparent tulip blooming in darkness—an image that contrasts with the flower’s natural tendency to close at night—hinting at the album’s central themes of contradiction and transformation.
Accompanying the image was a cryptic message describing the self as something that is never fully formed, instead evolving through cycles of division and fusion. The phrase reinforced the group’s signature “Billlieverse” storytelling, known for its layered and symbolic concepts.
12-track album expands “Billlieverse” narrative
The upcoming album will include a total of 12 tracks, led by the title song “ZAP.” Alongside it are new tracks such as “$ECRET no more,” “WORK,” “TBD,” “B’yond me,” “SOUPASTA,” and “OFF-AIR,” forming the core of the project.
The release will also feature four remix tracks, as well as a Korean-language version of “DOMINO ~ butterfly effect,” which was previously released in Japanese. The structure reflects a carefully designed musical progression, combining new material with reinterpretations to create a cohesive listening experience.
This album serves as a continuation of Billlie’s 2022 mini album the collective soul and unconscious: chapter one. While the earlier release focused on the emergence of cracks within its narrative world, the new project delves deeper into confronting and exploring those fractures.
Global producers and members contribute to album
The production lineup includes a range of internationally recognized figures. Among them are Korean artist Hwaji, known for multiple Korean Music Awards wins in the rap and hip-hop category, and Los Angeles-based producer Jake K of ARTiffect, who has contributed to numerous K-pop hits.
Swedish producer Ludwig “Loui” Lindell and songwriter Maria Marcus—who has accumulated over 9 million album sales across Korea and Japan—also participated in the project, adding to its global production scale.
In addition to external collaborators, members Siyoon, Moon Sua, and Haram contributed to the songwriting process. Their involvement is expected to enhance the album’s authenticity while highlighting the group’s growing creative input.
Comeback set for May release
Billlie’s first full-length album will be released on May 6 at 6 p.m. KST across major music platforms. As the group’s most extensive project to date, the album is positioned as a culmination of their musical development since debut.
With its combination of conceptual storytelling, international production, and member participation, the collective soul and unconscious: chapter two is expected to further establish Billlie’s distinct identity within the K-pop landscape.
The tracklist reveal marks the beginning of a broader promotional campaign, with additional teasers and content anticipated in the lead-up to the official release.
Park Minji is a K‑pop writer and journalist who delivers sharp insights and engaging stories on Korean music and culture for global readers.
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