Park Sun Ho has better chemistry with Kim Yoo Jung than Son Ji Hyun. Sun Ho and Ji Hyun were awkward, sometimes he cuts her lines. Maybe it was intentional.

Son Ji Hyun's acting was too rigid in the beginning, like she was playing a school theatre. Thankfully, her acting improved by miles in Why Her. She has the best chemistry with Baek Sung Hyun.

The ending is so powerful and emotional, you have to watch this WITHOUT SPOILERS. Almost made me cry.

The music is also soooo good, heartwarming, funny and bright.

Kim Yoo Jung carried the acting here, when she's around, the chemistry raised significantly