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Loossemble (Korean: 루셈블; RR: Rusembeul; MR: Rusembŭl) is a South Korean girl group formed by CTDENM. The group consists of five members: Hyunjin, Yeojin, Vivi, Go Won, and Hyeju. They debuted on September 15, 2023, with the single "Sensitive" from their eponymous extended play.
Name
The group's name, Loossemble, is a portmanteau of "Loona" and "assemble", defined by the agency as "five [Loona] members coming together as one".
Career
2023–2024: Introduction, and debut with Loossemble
On June 11, 2023, it was announced that Loona members Hyunjin and Vivi had signed with CTDENM after terminating their contracts with Blockberry Creative. Yeojin, Go Won, and Hyeju followed suit, with CTDENM confirming that they had signed with the agency on July 5.
On July 31, CTDENM announced that the quintet would re-debut as Loossemble with plans of releasing an album. Three days later, it was announced that the quintet would embark on the Loona Assemble the US Debut Ceremony starting from September 15. The tour would conclude with a "finale" once the group returns to South Korea. On August 23, it was announced that Loossemble would debut on September 15 with their self-titled extended play.
On March 18, 2024, CTDENM announced that Loossemble would be releasing their second extended play One of a Kind on April 16. The release date was later moved forward to April 15. On July 18, it was announced that the quintet would be embarking on their next US tour Up_Link Station across nine cities, beginning on October 6. On August 12, CTDENM confirmed that the quintet would be releasing their third extended play TTYL on September 2. On November 29, CTDENM announced that Loossemble's exclusive contract with the label has ended.