Season 1 Episode
- Season 1 The Emperor's Lost Gold
- Season 1 Spooky Stories
- Season 1 Ghost Story Riddles
- Season 1 Joining the Student Council
- Season 1 Student Council
- Season 1 Hye Seong's Father's Notebook
- Season 1 The 24th Anniversary of Byeongmun High School
- Season 1 The Plan for VIP Students
- Season 1 The Mathematics Teacher
- Season 1 Retribution
- Season 1 The Devastating Truth
- Season 1 Where The Stars Lead
Undercover High School
7.92 70 minutes 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.
