

The series ran 1 season across 12 episodes and has ended.
Featured in collections
Synopsis
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.
Ratings
| Source | Rating | Weight |
|---|---|---|
| IMDb | 7.7/10 | 71% |
| TMDB | 8.0/1067 votes | 29% |
| Balasaur Score | 78 | 100% |
Seasons
| 1 | Season 1 | 12 ep2025 |
Key crew
- Im Young-binCreator, Writer
- Choi Jeong-inDirector, Creator
Cast
- Seo Kang-joonJeong Hae-sung
- Jin Ki-jooOh Su-ah
- Kim Shin-rockSeo Myung-ju
- Kim Min-juLee Ye-na
- Yoon Ga-iPark Mi-jung
- Kim Young-ahIm Chung-ha
- Lee Hyun SoHan Seung-jae
- Yun Chae-binYun Chae-rin
- Kim Sun-minJi Hyeon-jun
- Kim Seung-beomKim Ho-jin
- Kang Pil-junSon Beom-Sik


























