Kim Ri-na as Kang Eun-soo

Lee Eun-sung as Kim Bo-ram

Yoo Ho-rin as Seo Yoo-jin

Heo Jin-yong as Lee Da-young

Son Ji-na as housemother

Seo Hye-rin as Seo Yoo-jin's mother

Shin Young-jin as nurse

Kim Joo-ryoung as teacher

Lim Jeong-woon as teacher

Choi Min-geum as director

Choi Jeong-in as Assistant Teacher 1