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

Danny Ahn

Kang Seung-wan

Park Young-seo

Yong-yi

Woo Hyeon

Mr. Park

Choi Jae-sup

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

Ju Jin-mo