Acting is top notch. Both male lead and female leads lived in the character!
Park Bo Young is so cute in this, her acting from cute tomboy to introverted shy girl, she is excelled in all.

Jung suk is cool as always. Kang ki young is funny as always. Everyone performaned well.
Bo young and Eui Shik lived in the role. Eui shik character is unpredictable and he played it in a ease.

Bo young's role is extremely difficult to pull. She has to switch between personalities which should be believable. She pulled it off with an ease.

Overall, this is one of the Dramas which I would watch again again.