The Pure Memories of My Heart: Seo Rin who was recognized for her directing skills abroad, returns to Korea and will be the director of a green drama "Natural Romance". She will also be reuniting with Soo Hyeok who has been with her for a long time, since they were young and on the set. Unlike before, Soo Hyeok is now a top actor. They spent their childhood together, and whenever Seo Rin sees Soo Hyeok who once confessed to her, she feels happy.