Oh Man-seok

Jang Suk-ho

Hong Jeong-pyo

Lee Dong-joon

Professor Sin

Bong-sam

Tae-geun

Lee Je-hee Foundation Secretary

Lee Taek-yeol

Um Sun-gu

Woodsman

Kwon Ji-woong

Choi Dong Joon [Ro Hee's great-uncle]

Yoo Gyo-yeon

Ji-eun's father

No Yu Cheol

Reporter Kang

Designer Lee [Hyun Joo's father]

Choi Young-hwan

Lee Young Goon [Professor]

Yun Taek Il [Seung Beom and Sun Ho's dad]

Kang Joo-man

Park Hyeong Su [Jing Seong's father]

Oh Sang Gun

Jong Soo [Jin Soo's father]

Chairman Baek

Jong Soo

[Young Geum and Ham Duk's father]

Joo Man-Yong

Jin-Soo's father