 Lee Yeon-heeChoi Eun-hwan | Choi Eun-hwan |
 Hyun BinKang Jae-kyung | Kang Jae-kyung |
 Lim Ju-hwanSeung-Joon | Seung-Joon |
 Jeong WookPrincipal | Principal |
 Lee Han-solMyung-sik | Myung-sik |
 Lee Young-hooChairman Kang | Chairman Kang |
 Lee Kan-heeEun-hwan's Mother | Eun-hwan's Mother |
 Do Yong-guMyung-sik's Father | Myung-sik's Father |
 Park Yoo-SunChild in Public Performance | Child in Public Performance |
 Kim Byeong-seLawyer | Lawyer |
| LLo Yong-JoonGoo -Ho | Goo -Ho |
 Yang Geum-seokSinging Class Member | Singing Class Member |
 Lee Jae-guTeacher | Teacher |
 Lee Mi-doMyung-suk's Younger Sister | Myung-suk's Younger Sister |
 Hong Dal-pyoJae-kyung's Father | Jae-kyung's Father |
| WWon Duk-hyunJae-kyung (Young) | Jae-kyung (Young) |
 Kim Jung-woonJae-soo's Friend #3 | Jae-soo's Friend #3 |
 Park Jin-youngButler | Butler |
 Kwon Oh-jinGas Station Boss | Gas Station Boss |
| KKim Gyung-aeSoon-chul's Grandmother | Soon-chul's Grandmother |
 Kim Kyeong-ranOld Woman with Fur Socks | Old Woman with Fur Socks |
 Kim Ki-dooPyung-chang's Classmate #3 | Pyung-chang's Classmate #3 |
 Park Sang-hoonJae-soo | Jae-soo |
 Kim ZioJae-soo's Friend #1 | Jae-soo's Friend #1 |
 Jo Gyu-chulNot listed | Not listed |
| KKim Seong-yeongJae-kyung's mother | Jae-kyung's mother |
