Casting
Park Ye-jin
Hong-joo
Baek Yoon-sik
Baek-jung
Ryu Deok-hwan
Hong-je
Oh Dal-su
Professor Kim Sang-chul / Professor Oh Byung-seok
데니 안
Kang Seung-wan
박영서
Yong-yi
Woo Hyun
Mr. Park
Choi Jae-sub
Teaching Assistant Lim Hee-cheol
Kwak Do-won
Senior Jeong
Baek Jae-ho
Detetctive Kim
Jang Joon-nyeong-I
Detective Park
Jang So-yeon
Baek-jung's wife