Season
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 - Season 1 Episode 10 Retribution
7.94 70 minutes To everyone's shock, Seo Myeong Ju returns to the school. Unimpressed by Hae Seong, she expels him and demonstrates her power by dismantling his team. However, refusing to back down, Hae Seong and the team, including Su A and her mother, devise a daring plan to infiltrate the school once more to retrieve the hidden gold bars
