장근석

Han Joon-soo

송하윤

Kim Byul

Moon Mason

Han Woo-ram

고규필

Ki-seok

최재환

Chun-sung

김병옥

Joon-soo's father

박현숙

Joon-soo's mother

정규수

Byeol's father

Jang Jung-hee

Byeol's mother