How many movies have Kang Seo and Sung Yeon acted in together?

They have worked on 5 movies together! Their first movie together was College Girl's Private Affair (2020) while their highest rated movie together was Dangerous Lesson (2020). They have not worked together since 성욕절정기 꽃분홍 중년 아줌마들 (2022). They are most known for their drama films together.