Secret Affair is by far my best k-drama ever. This is the only movie series that I watched each 16 episodes in full without hitting the fast-forward button. I commend the in-depth review here and agree 100% on the analysis of the film. For me, this film is my number one favourite, a truly realistic love-story of two souls who never waivered in their love for each other. The coherence and consistency of their characters are the marks of a beautiful, satisfying love-story. As a piano enthusiast, the choice of piano songs, the rendition(acting) and the conflation of superb direction is feast in my ears. This is the third k-drama series that I watched with the theme of older woman and younger man, but this movie barely dwelt on the age-gap between the lovers. The adulterous relationship makes this film grounded in realism. Is it a justification of adultery or a narrative of real life happening? I tend to favour the latter. Yoo Ah-in and Hee-ae-kim were perfect in their roles, and yes, it is easy to fall in love with Sun Jae firstly because of his musical genius and secondly of his strong sex appeal and it is not hard to fall for Hye Won bearing her elegance, beauty and talent as a pianist. It is inevitable for these individuals to fall for each other bounded by their love for music. This is 10/10 movie for me which I will enjoy watching again and again.