어느날 갑자기 세번째 이야기: D-day

김리나

Kang Eun-soo

이은성

Kim Bo-ram

유호린

Seo Yoo-jin

Heo Jin-yong

Lee Da-young

손지나

housemother

서혜린

Seo Yoo-jin's mother

신영진

nurse

Kim Joo-ryoung

teacher

임정운

Teacher 5

최민금

director

Choi Jeong-in

Assistant Teacher 1