- HD 1080
- Runtime: 66m.
- Status: Ended
2
- Languages: ko
- Country: South Korea
- Director: Kim Sang-hyub
- Stars: Lim Soo-jung, Lee Do-hyun, Jin Kyung, Woo Da-vi, Jang Hyun-sung
- keywords: corruption, age difference, mathematician, scandal, childhood trauma, genius, high school, revenge, romance, teacher, teacher student relationship, older woman younger man relationship, hidden past
- Production_studio: Studio Dragon, Bon Factory
- Seasons: 1
- Episodes: 16
- First air date: 2021-11-10
- Last air date: 2021-12-30
- providers: Netflix, Rakuten Viki, Netflix basic with Ads
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.