character - vice-principal (Yu-seong Tech)

character - Baek Cheol-gyu

character - Han Kyung-rok

character - Kim

character - Seon-ho's father

character - Yuk Si-gyeong

character - Pyo Dong-ho

character - Park Yoongab

character - Marshal Kim

character - Kim Byeong-chan

character - No Hak-Su

character - Kim Min-sub

character - Deok Chul's father

character - Kong Ji-cheol

character - [Chief neurosurgeon]

character - Kim In-Joo

character - Kang Mong-koo

character - Kwon Suk

character - Bae Sang-bok

character - [Oh Sol’s boss]

character - Representative Goo

character - Lee Woo-Taek

character - Yoon Sang-tae

character - Jo Se-hyeon

character - Pharm

character - Container Oya