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씨아이엑스

Boy group · C9 Entertainment · since 2019

CIX

씨아이엑스

C9 Entertainment's boy group with Wanna One's Bae Jinyoung at the centre, telling its albums as chapters from Hello to GO. "Movie Star" won The Show a week after debut; the group stopped in April 2026.

8years on 23 July 2027 · in 266 days

Their story

Complete in X

When Wanna One ended in early 2019, Bae Jinyoung went back to C9 Entertainment, and the label formed a new group around him. Of the other four, BX had reached ninth place on Mix Nine, and he and Seunghun had both been through YG Treasure Box. The name stands for "Complete in X": the group is only whole with every member. They debuted on 23 July 2019 with "Movie Star".

Albums told in chapters

"Movie Star" won The Show a week after release, an unusually fast start. From then on the music came in series. The Hello EPs, a story of sin and redemption, ended with "Cinema" in 2021. The OK series that followed turned to love, starting with the studio album OK Prologue: Be OK, which nearly tripled their first-week record. In 2023 OK Episode 2: I'm OK sold more than 130,000 copies in its first week.

Four members

Bae Jinyoung's contract with C9 ended in August 2024 and he left to go solo. The other four kept going. Thunder Fever in January 2025 was their first EP as a quartet, and that September GO Chapter 1: GO Together opened a new series, with BX working on three of its four songs. Between releases they kept touring, as they had since 2022, from Seoul and Tokyo to the United States.

How it ended

On 29 April 2026, C9 told fans that after several months of talks it was unavoidable to stop the group. BX's and Seunghun's contracts ended the next day. Yonghee had applied to enlist and was due to start basic training on 11 May, and Hyunsuk stayed until the end of May while filming a drama. C9 said it would stay in touch with the members in the hope that the CIX name might return with its own music one day.

Timeline

  1. Debut with the EP Hello Chapter 1: Hello, Stranger and "Movie Star".

  2. "Movie Star" wins The Show, a week after debut.

  3. Japanese debut with Warner Music Japan.

  4. Hello Chapter Ø: Hello, Strange Dream and "Cinema" close the Hello series.

  5. First studio album, OK Prologue: Be OK, led by "Wave".

  6. EP OK Episode 2: I'm OK with "Save Me, Kill Me".

  7. Bae Jinyoung leaves the group when his contract with C9 ends; CIX continue as four.

  8. Seventh EP Thunder Fever, their first release as a quartet.

  9. GO Chapter 1: GO Together, with BX on three of the four tracks.

  10. C9 Entertainment announces the end of CIX's group activities.

  11. 30 October 2026

Start with these 5 songs

  1. Movie StarThe debut song, and a music show winner within a week.2019
  2. CinemaThe song that closed the Hello story.2021
  3. Save Me, Kill MeTitle track of their best-selling album in its first week.2023
  4. ThunderThe first title track as a four-member group.2025
  5. Wonder YouThe lead song of their last EP, about wanting to know every small detail of someone you love.2025

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In the Fan Chart

The Fan Chart on The Crowd adds up every fan's top 10. Here is where CIX stands.

    Add CIX to your setlist

    For FIX

    BXLeader

    Name
    Lee Byoung-gon

    Competed on Mix Nine and YG Treasure Box before CIX, and worked on three tracks of their last EP.

    Seunghun

    Name
    Kim Seung-hun

    A former YG trainee who won Mnet's vocal survival show Build Up and joined the project group B.D.U.

    Yonghee

    Name
    Kim Yong-hee

    Applied for voluntary enlistment and was due to start basic military training on 11 May 2026.

    HyunsukYoungest member

    Name
    Yoon Hyun-suk

    Stayed under contract until 31 May 2026 so he could finish a drama that was then in production.

    Quick answers

    When did CIX debut?

    On 23 July 2019, with the EP Hello Chapter 1: Hello, Stranger and the title track "Movie Star".

    Who were the members of CIX?

    The final line-up was BX (leader), Seunghun, Yonghee and Hyunsuk. Bae Jinyoung, formerly of Wanna One, was a member from debut until his contract ended in August 2024.

    What is the CIX fandom called?

    FIX, short for "Faith in X". The name was announced on the group's 100th day, 30 October 2019.

    What does CIX stand for?

    "Complete in X": the group is only complete when all its members come together.

    Have CIX disbanded?

    Yes. On 29 April 2026 C9 Entertainment said the group would stop its activities after months of talks with the members. BX's and Seunghun's contracts ended on 30 April, Yonghee was due to start his military training on 11 May and Hyunsuk's contract ran until 31 May.

    Know your CIX?Six K-pop questions a day in the Daily, and a collectible card for every finished set.

    Play the Daily

    Last checked 30 October 2026. Spotted a mistake? Tell us.

    Sources