Jeong Jae-seong

as Na Byeong-mo

as Choi Chang-soo

as Lee Bong-seok

as vice-principal (Yu-seong Tech)

as Baek Cheol-gyu

as Han Kyung-rok

as Kim

as Seon-ho's father

as Yuk Si-gyeong

as Pyo Dong-ho

as Park Yoongab

as Marshal Kim

as Kim Byeong-chan

as No Hak-Su

as Kim Min-sub

as Deok Chul's father

as Kong Ji-cheol

as Chief neurosurgeon

as Kim In-Joo

as Kang Mong-koo

as Kwon Suk

as Bae Sang-bok

as [Oh Sol’s boss]

as Representative Goo

as Lee Woo-taek

as Yoon Sang-tae

as Jo Se-hyeon

as Pharm

as Briefing

as Reporter

as Container Oya