A brand new survival that 'builds up' the ultimate vocal boy group.
이다희
as Self - MC
김재환
as Self - Judge
이석훈
as Self - Judge
솔라
as Self - Judge
Baekho
as Self - Judge
웬디
as Self - Judge
서은광
as Self - Judge
Kim Seung-hun
as Self - Contestant
Jeong In-seong
as Self - Contestant
Jeon Woong
as Self - Contestant
Yeo One
as Self - Contestant
Im Joon-hyeok
as Self - Contestant
Episode 1
Episode 2
Episode 3
Episode 4
Episode 5
Episode 6
Episode 7
Episode 8
Episode 9
Episode 10
