Set in the constitutional monarchy in an imaginary South Korea, South Korea's Crown Prince Lee Jae Ha is forced to join the World Officers Competition, WOC, by his brother. There, he meets North Korea's strongest female devil instructor Kim Hang Ah.

Ha Ji-wonas Kim Hang-ah
Lee Seung-gias Lee Jae-ha
Lee Yoon-jias Lee Jae-shin
Cho Jung-seokas Eun Shi-kyung
Yoon Je-moonas Kim Bong-gu
Youn Yuh-jungas Bang Yang-seon (the Queen Mother)
Lee Sung-minas Lee Jae-kang (the King)
Lee Soon-jaeas Eun Kyu-tae
Jeong Man-sikas Rhee Kang-seok
Kwon Hyun-sangas Yeom Dong-ha