I didn't mind the relationship. I don't know why people leaving comments are outraged about that. People crush on their teachers all the time and no one actually acted on it at the time. But, I didn't like the actress. She's kind of irrelevant past the beginning. I get she had a tough time, but she's just miserable and boring. I have no idea why any of the men like her. She talks like she's half dead. But I did enjoy parts of this drama. The math. The lead actor. Principal Noh. She does a great job being evil. The overall kdrama is worth a watch. I always like a good revange story!