Principal Cast
Yoon Doo-joon
King Yi Do
Kim Seul-gi
Jang Dan-bi
Jin Ki-joo
Queen Sohyeon
Ahn Hyo-seop
Bak Yeon
Im Ye-jin
Dan-bi's Mother / Queen Wongyeong
Kim Kap-soo
Dan-bi's Father / Hwang Hui
Jeong Gyu-su
Sim On
Lee Dae-yeon
CSAT Supervisor / Choe Man-li
Ko Kyu-phil
Math Teacher / Chief Eunuch