Smile, You (2009)

Seo Jung In is the second daughter of a chaebol family, whose family suddenly meets with financial ruin. She is dumped by her husband, Lee Han Se, after their wedding ceremony when his family finds out about her family's financial problems. Her family is then left with no other alternative but to move in with their longtime chauffeur's family. The once rich and spoiled daughter and her family must now learn how to adjust to life as commoners in the Kang household.