Gong Yoo
Kang In-ho
Jung Yu-mi
Seo Yoo-jin
Kim Hyun-soo
Kim Yeon-doo
Jung In-seo
Jin Yoo-ri
Baek Seung-hwan
Jeon Min-soo
Jang Gwang
Principal / Principal's Brother
Kim Joo-ryoung
Yoon Ja-ae
Kim Min-sang
Park Bo-hyeon
Lim Hyun-sung
Young-hoon
Jeon Kuk-hwan
Attorney Hwang
Choi Jin-ho
Prosecutor
Kwon Hong-suk
Judge
Uhm Hyo-seop
Police Officer Jang
Park Hye-jin
Principal's Wife
Kim Ji-young
In-ho's Mother
Kim Ji-young
Sol-yi
Uhm Ji-sung
Young-soo
Lee Sang-hee
Auto Repair Shop Owner
Nam Myung-ryeol
Professor Kim Jung-woo
Jang So-yeon
Courtroom Sign Language Interpreter
Hong Seok-Yeon
School Custodian
Heo Jae-ho
Broadcasting Station PD
Jung Hyung-suk
Publishing Company Employee