The director spoke about Song Joong Ki and Song Hye Kyo's relationship on the set of the drama. He said, "They got very close near the end of filming compared to the beginning. At first, they were close just as a sunbae-hoobae. It's true that filming got a bit easier as the two people got closer. But I had no idea they would become actual lovers."
The Song-Song couple recently announced their marriage. They'll be holding a wedding this October.