Kim Kang-hyunKim Yeon-doo Jang KwangPrincipal / Principal's Brother Kim Min-sangPark Bo-hyeon Jeon Kuk-hwanAttorney Hwang Uhm Hyo-seopPolice Officer Jang Park Hye-jinPrincipal's Wife Kim Ji-youngIn-ho's Mother Lee Sang-heeAuto Repair Shop Owner Nam Myung-ryeolProfessor Kim Jung-woo Jang So-yeonCourtroom Sign Language Interpreter Hong Seok-yeonSchool Custodian Heo Jae-hoBroadcasting Station PD Jung Hyung-sukPublishing Company Employee Hwang Dong-hyukDirector / Screenplay Na Byung-junExecutive Producer Eom Yong-hoonExecutive Producer Chae Kyoung-sunProduction Design Kim Jung-gonSet Decoration Kim Ji-yongDirector Of Photography Rim Seung-heeCostume Design Park Jung-baeAssistant Director Kim Hyung-shekDigital Colorist MowgOriginal Music Composer Park Hyun-sooProduction Sound Mixer Lee Seung-chulSound Supervisor Han Myung-hwanSound Supervisor Jeong Ji-youngSound Effects Designer Do Young-hoonProduction Supervisor Jeon Gun-ikSpecial Effects Supervisor Park Eui-dongVisual Effects Kim Hyo-gangVisual Effects 
