Episode 4

Park Ka-hi

Self - Mentor

Kwon Hyun-bin

Self - Contestant

Park Sung-woo

Self - Contestant

Kim Eun-young

Self - Mentor

Lee You-jin

Self - Contestant

BoA

Self - Host

신유미

Self - Mentor

Lee Seok-hoon

Self - Mentor

권재승

Self - Mentor

Ju Haknyeon

Self - Contestant

Kang Daniel

Self - Contestant

Ong Seong-wu

Self - Contestant

Park Ji-hoon

Self - Contestant

Kim Do-yoon

Self - Contestant

Huang Minghao

Self - Contestant

Lee Hoo-rim

Self - Contestant