All episodes

Nam Sun becomes the school president. Se Chan, a star instructor, takes on a special post at Victory High.

In Jae and the principal argue. Min Gi’s mother on the PTA suggests Se Chan as the new homeroom teacher.

In Jae leaves, and Se Chan becomes the homeroom teacher. Ha Gyeong is accused of stealing a study guide.

School inspectors inquire about Se Chan’s illegal private lessons. Nam Sun starts serving Heung Su.

The police take Nam Sun, Heung Su, and Jeong Ho. In Jae and Se Chan refuse to obey the principal’s order.

A test sheet goes missing. In Jae and Se Chan try to find the culprit. Jeong Ho is bothered by Heung Su.

A special session opens over Park Heung Su’s incident. Nam Sun reveals his past to prove Heung Su’s innocence.

Nam Sun refuses to return to school. The principal demands that In Jae and Se Chan unify their curriculums.

Heung Su warns Jeong Ho to leave him and Nam Sun alone. Principal Im threatens In Jae over the national exam.

Nam Sun opens up to Heung Su. The students of Class 2 struggle with the exams. Min Gi agonizes over a secret.

Nam Sun decides he’ll be the one to transfer. Jeong Ho refuses to return to school, so Se Chan provokes him.

Ha Gyeong cuts Gang Ju’s hand. Nam Sun tries to keep In Jae from leaving. Jeong Ho is forced to do something.

Se Chan has to deal with Class 2 and the essay contest. Jeong Ho is beaten. Nam Sun tries to help Jeong Ho.

People hear the class money was used to bail Jeong Ho out. A phone goes missing. Nam Sun confronts his past.

Hye Seon’s phone is returned to lost and found. Kids narrow down the suspects. Se Chan finds the culprit.

Ha Gyeong tries to prevent the School Violence Committee hearing. Se Chan drafts his letter of resignation.