윤두준

King Yi Do

김슬기

Jang Dan-bi

진기주

Queen Sohyeon

Ahn Hyo-seop

Bak Yeon

임예진

Dan-bi's Mother / Queen Wongyeong

Kim Kap-soo

Dan-bi's Father / Hwang Hui

정규수

Sim On

이대연

CSAT Supervisor / Choe Man-li

고규필

Math Teacher / Chief Eunuch

Kim Ji-hyun