박예진

Hong-joo

Baek Yoon-sik

Baek-jung

류덕환

Hong-je

Oh Dal-su

Professor Kim Sang-chul / Professor Oh Byung-seok

데니 안

Kang Seung-wan

박영서

Yong-yi

Woo Hyeon

Mr. Park

Choi Jae-sup

Teaching Assistant Lim Hee-cheol