I also wanted to see if anything had changed from last year for me; the expectations, what I like watching, etc.

The first time I heard of the drama was when I was watching one of the variety shows. Maybe it was "2 Days 1 Night" or something similar, where they showed the snowman scene and where it was filmed. There were probably some other times when I heard of it or saw something, because when I heard the OST, it felt so familiar.