The right song can make or break a scene in a kdrama. And when you start to hum along with it, you know that drama has made a place in your heart.

The evidence for the effectiveness of beautiful soundtracks is present in the latest OST additions to the popular dramas "Good Doctor" and "The Master's Sun." Both of these dramas are doing well in the ratings because of their smart scriptwriting and top-notch acting, but there's no doubt that the soundtracks also help to set a convincing mood.

Perhaps the most moving song among the latest soundtrack additions is the ballad "Crying" which serves as the theme for Moon Chae Won's character in the medical drama "Good Doctor."

Baek Ji Young, who is often called "The Queen of the Ost" for her contributions to drama soundtracks, sings the song with great sincerity. She captured the character's heartbreaking experiences-as a doctor and a woman-so well that the sad song topped the charts the day it was released.

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