Jung Gun-joo

as Ji-seok (1 episode)

as Yoo Ah-ram (1 episode)

as Cheon Hae-beom (7 episodes)

as Lee Hong-seok (6 episodes)

as Chun Joon-hwa (16 episodes)

as Won seo-hu (1 episode)

as Moon Tae Oh [Do Hyun's tutor] (12 episodes)

as Self (2 episodes)

as Jung Kang-ho

as Jung Yoo-Ha (18 episodes)

as Ye-sul's ex-boyfriend (1 episode)

as Shin Gyeom (16 episodes)

as Ryu Hyung Jin [Baseball player] (1 episode)

as Choi Kang Eu Tteum (16 episodes)

as Choi Woong (12 episodes)

as Lee Do-hwa (32 episodes)

as Choi Woong (8 episodes)

as Cha Yeon-wu (10 episodes)

as Joo Woo Jin

as Mr. Choi [P.E. Teacher] (1 episode)

as Jung Gun Joo [Intern] (1 episode)

as [Man at expressway rest area] (1 episode)

as Choi Woong (11 episodes)

as Jo Woo-Jin (1 episode), as Won Seo-Hu (1 episode)

as Self (3 episodes)