Koo Ja-geon

as Track and Field Athlete

as College Student

as store employee 1

as Kim Jun-u • 3 eps

as [Barista] • 2 eps

as [Baduk player] • 1 eps

as Student • 1 eps

as Prisoner • 3 eps

as Jeong Pal • 8 eps

as [Sungkyunkwan scholar] • 1 eps

as Kwon Tae-gi's friend • 2 eps

as [Da Hyeon's ex] • 1 eps

as Bus passenger • 1 eps

as [Delinquent] • 2 eps

as Job interviewee • 1 eps

as [College student] • 2 eps

as Bank security guard • 1 eps

as Guy Waiting in Line with Friend (Denim Jacket) • 1 eps

as Recruit • 2 eps

as [Food palanquin bearer] • 1 eps

as Woo Hyun • 24 eps

as Kim Sung Hoon • 11 eps

as Ha Tae Sung • 12 eps

as Oh Seung Woo • 10 eps

as [Oh Dol's friend] • 16 eps