Oh Man-seok

as Jang Suk-Ho

as Hong Jeong-pyo

as Lee Dong-joon

as Lee Taek-yeol

as Um Sun-gu

as Designer Lee [Hyun Joo's father]

as Lee Young Goon [Professor]

as Kang Joo-man

as Park Hyeong Su [Jing Seong's father]

as Chairman Baek

as Yoo Nam-soo

as Yun Sang-gi