Kim You-jung

Na Bo-ra

Kang Chae-young

Bok-soon

Ong Seong-wu

Joseph / Poong Joon-ho

Gong Myoung

Jung Woon-ho

Park Hae-jun

Doctor at School Infirmary

Ryu Seung-ryong

Poong Woon-ho's Father

Lee Beom-soo

School Teacher

Han Hyo-joo

Adult Na Bo-ra

Kim Nu-rim

Dong-wook

Jeon Hye-won

Darn It

Yoon Yi-reh

Madam

Jeong Seok-yong

Bo-ra's Father

Kim Sung-kyung

Bo-ra's Mother

Roh Yoon-seo

Kim Yeon-du

Park Jung-woo

Baek Hyun-jin

Byeon Woo-seok

Poong Woon-ho

Bang Woo-ri

Yeon-du's Mother