Secret Sunshine (2007)

Shin Ae (played by Jeon Do-yeon) takes her son to the small town of Miryang, the hometown of her late husband. She opened a piano academy there, hoping to find a new life with her son, allowing her son to grow up in the place where her late husband grew up as a child, and feel the sunshine and human kindness of Miryang. However, the car broke down halfway and luckily met Zong Can (Song Kanghao)...