A musical battle between 6 trending girl group acts, in order to "determine the real number one" when all 6 release their songs at the same time.
Go Won
Self - Contestant
Huening Bahiyyih
Self - Contestant
Ezaki Hikaru
Self - Contestant
Kim Dayeon
Self - Contestant
Kim Chaehyun
Self - Contestant
Luda
Self - Contestant
Soobin
Self - Contestant
Exy
Self - Contestant
Kim Lip
Self - Contestant
Eunseo
Self - Contestant
HeeJin
Self - Contestant
SinB
Self - Contestant
Eunha
Self - Contestant
Lee Yuna
Self - Contestant
Eun Ji
Self - Contestant
HyeJu
Self - Contestant
CHUU
Self - Contestant
JinSoul
Self - Contestant
HaSeul
Self - Contestant
Bona
Self - Contestant
Seola
Self - Contestant
Umji
Self - Contestant
Kang Yeseo
Self - Contestant
Seo Youngeun
Self - Contestant
Yeonjung
Self - Contestant
Dayoung
Self - Contestant
Yeoreum
Self - Contestant
Choi Yujin
Self - Contestant
Shen Xiaoting
Self - Contestant
Sakamoto Mashiro
Self - Contestant
Taeyeon
Main Host
Hyolyn
Self - Contestant
Lee Yong-jin
Self - Queen Manager
Min Young
Self - Contestant
Choerry
Self - Contestant
HyunJin
Self - Contestant
ViVi
Self - Contestant
Yves
Self - Contestant
YeoJin
Self - Contestant
Yu Jeong
Self - Contestant
