Billlie (; stylized as Bi11lie or Billlǃə) is a South Korean girl group formed by Mystic Story. Billlie debuted on November 10, 2021, with the extended play (EP) The Billage of Perception: Chapter One. The group originally consisted of six members: Moon Sua, Suhyeon, Haram, Tsuki, Siyoon and Haruna. A seventh member, Sheon, later joined the group.
Name The name Billlie is spelled with three Ls due to the fact that the name can be broken down into 'Bi' (Korean word for rain), '11''', and 'lie' — Bi11lie. The number '11' came from their group's legend; "When the 11th bell rings in the middle of a purple rain, something strange happens", where the members lie about what happened in order to keep the event a secret. The name also reflects their "B-sides, the inner-self that everyone has inside them", which they express in hope to empathize with the audience.
Career Pre-debut The members of Billlie were known as Mystic Rookies — a rookie development program under Mystic Story. On September 14, Mystic Story announced plans to debut Mystic rookies in November 2021. On October 11, it was revealed that the group would be named 'Billlie'.
Prior to debut, Moon Sua was a YG Entertainment trainee for 10 years. She participated in the music competition program Unpretty Rapstar 2 finishing as the third runner-up. Suhyeon participated in the Mnet survival program Produce 101 placing 69th and eliminated in the fifth episode. She also participated in the JTBC survival program Mix Nine and starred in the web drama A-Teen in 2018, and its 2019 sequel A-Teen 2. Haram and Tsuki are former SM Entertainment trainees. Additionally, Tsuki worked as a model for the magazine Popteen and released the single "Magic" with the modeling group MAGICOUR in 2020. Sheon participated in the Mnet survival program Girls Planet 999, and was eliminated in the final episode placing tenth. Siyoon participated in the talent show K-pop Star 5 and also worked as a model for the magazine Popteen.
2021–2023: Debut On October 28, 2021, it was announced that their debut EP The Billage of Perception: Chapter One would be released on November 10. A fan song titled "Flowerld", which was also included on the EP, was also released on the same day. On November 10, their debut EP The Billage of Perception: Chapter One was released featuring lead single "Ring X Ring" and five B-side tracks. On November 19, it was announced that Kim Su-yeon, who had participated in Girls Planet 999, would join the group under the stage name Sheon (션) as the seventh member, and would officially join the group for their next album. On November 27, Sheon made a surprise appearance performing title track "Ring X Ring" along with the other members on South Korean music show Show! Music Core, marking her first appearance with the group. On December 14, the group released their first digital single album The Collective Soul and Unconscious: Snowy Night with "Snowy Night" as the lead single. The single is the group's first release to feature member Sheon.
On February 11, 2022, it was announced that Billlie would be releasing their second EP The Collective Soul And Unconscious: Chapter One, featuring lead single "GingaMingaYo (The Strange World)" on February 23. On March 1, the group released their first soundtrack album The Collective Soul and Unconscious: Chapter One Original Soundtrack from "What Is Your B?". On August 8, it was announced the group would be releasing a direct sequel to their first EP. On August 16, it was announced that their third EP The Billage of Perception: Chapter Two, featuring lead single "Ring Ma Bell (What a Wonderful World)", would be released on August 31.
On February 7, 2023, it was announced the group would be releasing their fourth EP. On March 6, it was announced that their fourth EP The Billage of Perception: Chapter Three, featuring lead single "Eunoia", would be released on March 28. On April 20, Mystic Story announced that the group's activities have been halted, due to the sudden death of Moon Sua's brother Moonbin of Astro. Subsequently on April 25, Mystic Story announced that promotions for the EP have concluded, and that member Moon Sua would be taking time off, with the remaining 6 members to continue activities. On June 15, It was announced that Suhyeon would also be going on hiatus, for health reasons. The group released their first single album Side-B: Memoirs of Echo Unseen. The album's single "BYOB (Bring Your Own Best Friend)", together with its English-language version, was pre-released on September 27. The lead single "Dang! (Hocus Pocus)", together with the entire album was released on October 23. Members Moon Sua and Suhyeon would not be involved in this release due to their hiatuses from health issues.
2024–present: First sub-unit and first studio album On April 12, 2024, it was announced that members Moon Sua and Suhyeon would resume activities after being on hiatus due to health issues. On October 2, it was announced that the group would be releasing their fifth EP Appendix: Of All We Have Lost on October 16, with the pre-release single "Trampoline" releasing on October 11. The music video teaser for the lead single "Remembrance Candy" () includes a special narration by singer-songwriter IU, who also wrote the lyrics for the song.
On April 1, 2025, the group announced that they would debut their first sub-unit consisting of members Moon Sua and Siyoon on April 7, with the release of the single "Snap" featuring Sokodomo.
On January 19, 2026, it was announced that Billlie would release a pre-release single titled "Cloud Palace (False Awakening)" on January 27, ahead of their upcoming album The Collective Soul and Unconscious: Chapter Two''. On April 15, the album was announced and subsequently released on May 6 as the group's first studio album.
Members Moon Sua () Suhyeon () Haram () Tsuki () Sheon () Siyoon () Haruna ()
Timeline
Discography Studio albums + List of studio albums, showing selected details, selected chart positions, and sales figures Title Details Peak chartpositions Sales KORPeak chart positions on Circle Album Chart: The Billage of Perception: Chapter One: The Collective Soul and Unconscious: Chapter One: Track by Yoon: Patbingsu: The Billage of Perception: Chapter Two: The Billage of Perception: Chapter Three: Side-B: Memoirs of Echo Unseen: Appendix: Of All We Have Lost: The Collective Soul and Unconscious: Chapter Two: The Collective Soul and Unconscious: Chapter Two Released: May 6, 2026 Label: Mystic Story Formats: CD, digital download, streaming 14 KOR: 31,425Cumulative sales for The Collective Soul and Unconscious: Chapter Two:
Extended plays + List of extended plays, showing selected details, selected chart positions, and sales figures Title Details Peak chartpositions Sales KOR JPN The Billage of Perception: Chapter One Released: November 10, 2021 Label: Mystic Story Formats: CD, digital download, streaming 12 — KOR: 24,698 The Collective Soul and Unconscious: Chapter One Released: February 23, 2022 Label: Mystic Story Formats: CD, digital download, streaming 5 18 KOR: 89,362Cumulative Sales of The Collective Soul and Unconscious: Chapter One
JPN: 2,681 The Billage of Perception: Chapter Two Released: August 31, 2022 Label: Mystic Story Formats: CD, digital download, streaming 3 23 KOR: 91,070Cumulative Sales of The Billage of Perception: Chapter Two:
JPN: 2,441 The Billage of Perception: Chapter Three Released: March 28, 2023 Label: Mystic Story Formats: CD, digital download, streaming 5 26 KOR: 91,143Cumulative Sales of The Billage of Perception: Chapter Three:
JPN: 1,676 Appendix: Of All We Have Lost Released: October 16, 2024 Label: Mystic Story Formats: CD, digital download, streaming 14 — KOR: 46,055Cumulative Sales of Appendix: Of All We Have Lost
Japanese Knock-on Effect Released: February 7, 2024 Label: Victor Entertainment Formats: CD, digital download, streaming — 14 JPN: 3,791 "—" denotes a recording that did not chart or was not released in that territory
Single albums + List of single albums, showing selected details, selected chart positions, and sales figures Title Details Peak chartpositions Sales KOR JPN Track by Yoon: Patbingsu Released: July 14, 2022 Label: Mystic Story Formats: CD, digital download, streaming 7 — KOR: 54,048 Side-B: Memoirs of Echo Unseen Released: October 23, 2023 Label: Mystic Story Formats: CD, digital download, streaming 6 — KOR: 43,318 Japanese GingaMingaYo (The Strange World): Japanese ver. Released: May 17, 2023 Label: Victor Entertainment Formats: CD, digital download, streaming — 4 JPN: 12,063 "—" denotes a recording that did not chart or was not released in that territory
Soundtrack albums + List of soundtrack albums, showing selected details Title Details The Collective Soul and Unconscious: Chapter One Original Soundtrack from "What Is Your B?" Released: March 1, 2022 Label: Mystic Story Formats: Digital download, streaming The Billage of Perception: Chapter Two Original Soundtrack from "The End of the World and the Awakening" Released: September 8, 2022 Label: Mystic Story Formats: Digital download, streaming
Singles + List of singles, showing year released, selected chart positions, and name of the album Title Year Peak chart positions Album KORDown.Peaks on the Circle Download Chart: "Ring X Ring": "GingaMingaYo (The Strange World)": "Patbingsu": "Ring Ma Bell (What a Wonderful World)": "Eunoia": "Dang! (Hocus Pocus)": "The Soul Savior: I Don't Need a Superman": "1월 0일 (A Hope Song)": "Trampoline": "Remembrance Candy": "Cloud Palace": "Zap": JPN JPNHeat. "Ring X Ring" 2021 167 — — The Billage of Perception: Chapter One "Snowy Night" — — — "GingaMingaYo (The Strange World)" 2022 92 4 6 The Collective Soul and Unconscious: Chapter One "Patbingsu" ()) 144 — — Track by Yoon: Patbingsu "Ring Ma Bell (What a Wonderful World)" 32 — — The Billage of Perception: Chapter Two "Eunoia" 2023 47 — — The Billage of Perception: Chapter Three "Dang! (Hocus Pocus)" 60 — — Side B: Memoirs of Echo Unseen "The Soul Savior: I Don't Need a Superman" 197 — — The Billlie's Odditorium' The First Edition "January 0th (A Hope Song)" 2024 75 — — The Billlie's Odditorium' The Second Edition "Domino (Butterfly Effect)" (Japanese version) — — — Knock-on Effect "Trampoline" 72 — — Appendix: Of All We Have Lost "Remembrance Candy" () 40 — — "Cloud Palace" 2026 50 — — The Collective Soul and Unconscious: Chapter Two "Zap" 43 — — "Work" 32 — — "—" denotes a recording that did not chart or was not released in that territory
Other charted songs + List of singles, showing year released, selected chart positions, and name of the album Title Year Peak chart positions Album KORDown.Peaks on the Circle Download Chart: Songs from The Billage of Perception: Chapter Three: "BYOB (Bring Your Own Best Friend)": Songs from The Collective Soul and Unconscious: Chapter Two: "Enchanted Night (白夜)" 2023 121 The Billage of Perception: Chapter Three "Lionheart (The Real Me)" 123 "Various and Precious (Moment of Inertia)" 130 "Extra-ordinary" 131 "Nevertheless" 126 "BYOB (Bring Your Own Best Friend)" 105 Side-B: Memoirs of Echo Unseen "$ecret No More" 2026 169 The Collective Soul and Unconscious: Chapter Two "TBD" 159 "B'yond Me" 178 "Soupasta" 175 "Off-Air" 170 "Domino (Butterfly Effect)" (Korean version) 197
Videography Music videos