The plot, cinematography, chemistry, acting , ost... Literally everything is perfect. It's my second most fav drama ever after goblin. Shin hye sun is a brilliant actress and I watched it for her. She did an amazing job, and the dance routines recorded were visually pleasing. I could watch this drama any day. It was funny, sad , cute and everything I wanted in a drama. Male lead is very endearing and the kiss scenes were swoon worthy as well. Second lead is the most annoying guy I've ever met. But that was his role and ig he did a fine job. Nina should've been explored a little more but nonetheless it was hard to dislike her. The elder sister was beautiful and her acting was amazing. I loved her. The casting was literally perfect