
Notes
It’s mind-blowing. I like math, but I've had a hard time understanding it since it's on a different level. I love the ending of it, though I didn't cry over it because all of the episode is just about proving their work or more like solving the problems, but in the end, when the grandpa died, I bawled my eyes out, like I've already known that once he closes his eyes, he will never wake up, and to the principal, even though she did a lot of bad things, I pity her. She only did it because of her father. When she said that she would do her best or whatever just for her father to call her, I cried. And also to Ye-lim, I love how brave she is because she didn't want her brother to experience what she did. Sincerely, I thought I would finish this in just 2 days, but it took 6 days to finish it. I don't know, there are times that I get bored, and right now, I'm having the flu, so I thought I couldn't finish it since my head hurts a lot, but since I want to watch a new drama, I've tried finishing it, and it didn't disappoint me, so I'm happy that I didn't drop this drama. Overall, it's a 10 out of 10. I loved it.

Synopsis
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.