character - Yu Shin-woo

character - Chairman Lee Sam-goo

character - Company president Lee

character - Ma Pa-ram

character - Man-taek's grandfather

character - Uhm Hwi Jang

character - Shi Yeon's Father

character - Grandfather from Kangwondo

character - Seung-wan's father

character - Principal

character - Choi Kyung-son

character - Choi Kyu-ha

character - Bong-soo's father

character - Dong-sik