Rowoon

as Jang Siyul (9 episodes)

as Singer's Manager (2 episodes)

as Self (1 episode)

as MC

as Shim Jung-woo (16 episodes)

as Tae-ha (1 episode)

as Jang Sin-yu (16 episodes)

as Self (1 episode)

as MC (12 episodes)

as Choi Jun-woong (16 episodes)

as Jung Ji-woon (20 episodes)

as Himself, as Self - Contestant (10 episodes)

as Chae Hyun-seung (16 episodes)

as Self (1 episode)

as Self (9 episodes)

as Joo Yeo-Min (1 episode)

as Number 13 / Haru (32 episodes)

as Self (1 episode)

as Ko Eun-sub (32 episodes)

as Self (2 episodes)

as Self (1 episode)

as Choi Wi-Jin (16 episodes)

as Self (2 episodes)

as Kim Seok-woo (1 episode)