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Kocowa

The Emperor's Lost Gold

Spooky Stories

Ghost Story Riddles

Joining the Student Council

Student Council

Hye Seong's Father's Notebook

The 24th Anniversary of Byeongmun High School

The Plan for VIP Students

The Mathematics Teacher

Retribution

The Devastating Truth

Where The Stars Lead

Season 1

Action & Adventure

Comedy

Drama

Undercover High School

Specials

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.