A sexual scandal between a math teacher and a student in a prestigious high school ended in tragedy. 4 years later they meet again, now as adults, to reveal the corruptions in school and to regain one's reputation as a teacher.
| Title | Time | |
|---|---|---|
| 1 | Fermat’s Last Theorem | 2021-11-10 |
| 2 | Baek Min Jae | 2021-11-11 |
| 3 | Infinite and Finite | 2021-11-17 |
| 4 | The Ten-Year-Old Genius | 2021-11-18 |
| 5 | Faulty Brakes | 2021-11-24 |
| 6 | The Midterms | 2021-11-25 |
| 7 | Seung Yoo Returns | 2021-12-01 |
| 8 | Seung Yoo’s Project | 2021-12-02 |
| 9 | Unlocking Yoon Su’s Heart | 2021-12-08 |
| 10 | The Audit | 2021-12-09 |
| 11 | Face to Face at Last | 2021-12-15 |
| 12 | Flawed Premise | 2021-12-16 |
| 13 | A Place Of Warmth | 2021-12-22 |
| 14 | Asung’s New Director | 2021-12-23 |
| 15 | Ji Na’s Guilt | 2021-12-29 |
| 16 | Noh Jung Ah’s Collapse | 2021-12-30 |
