Character Name : Seo Yoon-soo

Original Name : 김시후

Gender : Male

Character Name : Hae-won

Original Name : 김윤혜

Gender : Female

Character Name : Hyeong-joon

Original Name : Oh Hee-jun

Gender : Male

Character Name : Gwang-seop

Original Name : Kim Gwang-seop

Gender : Male

Character Name : Foreman Park

Original Name : 문창길

Gender : Male

Character Name : Young-jun

Original Name : Lee Tae-hee

Gender : Male

Character Name : Hae-won's Father

Original Name : 정인기

Gender : Male

Character Name : Ji-yeon

Original Name : 박소담

Gender : Female

Character Name : Young-jae

Original Name : Jang In-sub

Gender : Male

Character Name : Homeroom Teacher

Original Name : Han Hee-jung

Gender : Female