What's Up?

Lim Ju-hwan

Jang Jae-Hun (20 episodes)

Oh Man Seok

Sun Woo-Yeong (20 episodes)

Kim Ji-Won

Park Tae-Yi (20 episodes)

Im Joo-eun

Oh Doo-Ri (20 episodes)

Jo Jeong-Seok

Kim Byung-Gun (20 episodes)

Dae-Sung Kang

Ha Do-Sung (20 episodes)

Hie-jin Jang

Eun Chae-young (20 episodes)

Lee Soo-Hyuk

Lee Soo-bin (20 episodes)

Ahn Seo-Hyun

Oh Doo-ri (young) (20 episodes)

Song Ok-suk

Jang Jae-heon's mother (20 episodes)

Kim Mi-kyeong

Professor Yang Soo-jung (20 episodes)

Song Ji-won

Director (20 episodes)

Song Ji-na

Writer (20 episodes)