姐姐的朋友

郑书允

Park Soo-jin

Kim Yoo-gang

Cho Sung-jae

Joo In-cheol

Kim Joo-hyuk

朴初炫

Seo Ji-eun

郑东奎

President Cho / Sung-jae's Father

Kim Neul-me

Manager Kim

Kim Bo-ri

[College Preparatory Principal]