저 하늘에도 슬픔이

Kim Yoo-nah

Yun-suk

Park Nam

Yun-sik

Park So-yeong

Sun-na

Kim In-jeong

Ok-i

Park Soon-cheon

Mother

Yoon Cheol-hyeong

Father

Ryu Mi-oh

Vice Principal

Kim Hyeong-il

Publisher

Baek Il-seob

Gyeong-su's Father

Kim Chung-ran

Gyeong-su's Mother

Yeo Un-gye

Doctor

Jeong Hye-seon

Principal

Jeon Won-joo

School Parent

Hong Yun-jeong

Loan Shark

Kim Il-woo

Dispatcher