Ha-neul Kang
— Young-ho
Chun Woo-hee
— So-hee
강소라
— Soo-jin
이설
— So-yeon
임주환
— Young-hwan
이항나
— Mother
Lee Yang-hee
— Father
Park Se-hyun
— Student
Lee Ye-hwan
— Cram School Student
김성균
— Teacher
Go Geon-han
— Jong-guk
남현우
— Student
Kim Min-seo
— Student
Kang Young-suk
— Book Worm
Choi Myeong-bin
— Young So-hee
Won Ji-u
— Young So-yeon
고우림
— Young Young-ho
이태영
— Teaching Assistants
우정원
— Teacher