as Kim Seok-hyun

as Na Jung-beom

as Han Myung-Jin

as Noh San-woo

as Ok Ju-man

as Disciplinary Teacher

as [Ik Jun's professor]

as Park Jin-man

as Jeon Won-Chool

as Hwang Doo-Sik

as Kong Seung-Cheol

as Yoon Seung-Soo

as Professor Park

as Hunter Ahn