as Lee Bong-seok

as vice-principal (Yu-seong Tech)

as Baek Cheol-gyu

as Kim

as Han Kyung-rok

as Kim Byeong-chan

as Pyo Dong-ho

as Seon-ho's father

as Park Yoongab

as Marshal Kim

as Yuk Si-gyeong

as Kim Min-sub

as No Hak-Su

as Deok Chul's father

as Kong Ji-cheol

as Chief neurosurgeon

as Kang Mong-koo

as Kim In-Joo

as Kwon Suk

as Bae Sang-bok

as Jo Se-hyeon

as Representative Goo

as Lee Woo-taek

as [Oh Sol’s boss]

as Yoon Sang-tae

as Pharm

as Container Oya