Seo Kang-Joon
Jeong Hae-seong
Action · Comedy · Thriller
Ace NIS agent Jung Hae-seong is demoted after a mission failure. He goes undercover at a high school to locate King Gojong's missing gold, meeting his teacher Oh Soo-ah, who sees him as her lost first love, stirring old heartbreak.
Watch nowPeople
Jeong Hae-seong
Oh Soo-ah
Lee Ye-na
Seo Myeong-joo
Soo-ah's Mother
Kim Hyeong-bae
Ahn Seok-ho
Ahn Yoo-jeong
Go Young-hoon
Park Mi-jeong
Park Jae-moon
Kim Ri-an
Head teacher
Han Seung-jae
Lee Dong-min