The girls were backup dancers for Star Empire's groups and participated in Produce 101 and MixNine before their debut.

• archive

Their full pre-debut history is archived as pre-debut.

as backup dancers:

• 130802 | Yunji; Jewelry - Hot & cold on Music Bank
• 131109 | Yunji; ZE:A - My heart trembles on Immortal Song
• 131123 | Yunji; ZE:A Illusionist Concert Apink's Nonono cover
• 140412 | Yunji; ZE:A - Step by step on Immortal Song
• 150523 | Nine Muses Dream Concert 2015
  • Yunji and Sihyeon
  • Yunji | Sihyeon
• 180408 | Yeori; Jewelry - One more time on Sugarman
• 2019 | IMFACT - Only U promotions
  • Sihyeon (0124-0131), (0219-0308)
  • Yeori (0201-0208)
  • Hyogyeong (0212-0215)

other:

• 2012 | Hyogyeong; Jeonnong Middle School Art Festival
• 130109 | Yunji; C.S Vocal Academy | In a duet
• 2013 | Yunji; Superstar K audition | Cut
• 2013 - 2014 | Yunji; Star Camp
  • EP. 2 - 1:38
  • EP. 3 - 1:02
  • EP. 4 - 0:10
  • EP. 5 - 7:38
• 2014 | Hyogyeong; Singing 가시나무
• 140412 | Sihyeon; Yoo Seongeun - Stop still at BOB Nowon Music
• 190222 | Dawon; I can see your voice 6 ep. 6
  • Intro | Performance
• 190228 | Yeori; 석양빛 안녕 - cover by Imfact's Jian
• 190508 | Yeori; Seoul - places I should go to at least once: Children's grand park
• 191019 | Yunji, Dawon & Sihyeon - Trainee at BOF
  • Performance | Fancam
  • Behind of