One of the best high-school dramas. Would've given it a perfect score if the ending was according to what majority of the viewers eagerly awaited for. Just don't think about whether to watch it or not and give it a go. You'll love it!
What I liked:
The cast specially Kim So Hyun was fantabulous. Her dual role in this drama is top notch and you can feel the difference between the two characters instantly.
The story line was also good and focused mainly on father-son,mother-daughter,teacher-student and friends which made it a lot more appealing apart from the romance.
What I disliked:
The only thing I disliked was the ending. Like c'mon,it wouldn't have been so hard for the writers to come up with the ending the viewers craved for. I was heart-broken with the ending.
Caution: The second-lead syndrome in this drama is for real!