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The Beginning of the Attempted Murder Case

Gi Mu Hyeok Returns As a Teacher

Byung Ho Gets Bullied

The Chauffeur

The Secret Sysop

Ye Ri’s Trap

Tae Ra’s Recital

Class Two’s New Homeroom Teacher

Spy App

Tae Seok’s Death

Restoring Beom Jin’s Phone

Han Su Wakes up from a Coma

Han Su’s False Testimony

Su Ah’s Mail

The Big Blow

Beom Jin Stands as a Witness

Season 1

Crime

Mystery

Class of Lies

Ki Moo-Hyeok, a lawyer with a high winning rate, only cares about money. Due to a murder case at a high school which he deals with, his reputation as a lawyer hits rock bottom. To regain his good name as a lawyer, he sneaks into the high school and work as a temporary teacher. He tries to reveal a secret which the students have, and gets involved with Teacher Ha So-Hyun, a P.E. teacher who loves her students. They then face the students'secret.