Behind your smile the name itself says about the story. The hero's smile is mysterious.I loved this drama, it is associated with revenge.

I liked the heroin's role. She was just perfect. She was so adorable. She justified her role.

I also liked the lead actor's role. At first it showed that he is cold hearted but after some time you will find him caring and love his character.

Other characters also play their roles well.
It has a beautiful story, so you may like it.

It's ost is best. Although I don't understand their language but I like to listen its ost.

As a whole its a must watch drama as it is light hearted drama.