소지섭
Woo-jin
손예진
Soo-a
Kim Ji-hwan
Young Ji-ho
고창석
Hong-gu
이준혁
Swimming Instructor
손여은
Hyun-jung
이유진
Young Woo-jin
김현수
Young Soo-a
배유람
Young Hong-goo
서정연
Seo-bin's Mother
박서준
Ji-ho
공효진
Han Bok-nyeo
Shin Woo-hee
Homeroom Teacher
Jo Ha-seok
Relative
Seo Young-sam
Bus Driver
Lee Min-sung
Seo-bin
Lee Seung-joon-III
PE Teacher
