From Wikipedia, the free encyclopedia. Kong Hyo-jin (born April 4, 1980) is a South Korean actress. She is best known for her leading role in the film Crush and Blush (2008), as well as for her popular television series Sang-doo! Let's Go to School (2003), Thank You (2007), Pasta(2010), The Greatest Love (2011), and Master's Sun (2013).