How many movies have Park Cheol-su and Seo Kyeong-sook collaborated on?

They have worked on 3 movies together! Their first movie together was A Journey with Korean Masters (2013) while their highest rated movie together was Green Chair 2013 - Love Conceptually (2013). They have not worked together since Green Chair 2013 - Love Conceptually (2013). They are most known for their drama films together.