Kep1er is a girl group formed in 2021 through the survival show Girls Planet 999 and officially debuted on January 3, 2022. The group consists of seven talented members: Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru, Huening Bahiyyih, and Youngeun. Mashiro and Yeseo left the group in July 2024 after their contracts expired.

The group is known for their versatile vocal abilities, energetic performances, and charismatic stage presence. Their debut album FIRST IMPACT was well received by both fans and critics and included hits like “Wa Da Da” and “Hello.”