Both has the same screenwriter
Both has the actors Hwang Young Hee, Shin Jae Ha and Kim So Hyun (Guest Role).
The Kim So Hyun character really is looks alike in both dramas, She is a pianist and She has some kind of relationship with Shin Jae Ha character, it's references from Page Turner.
The relationship mom-son (Cha Shik's Mom- Cha Shik) in Page Turner is alike the relationship mom-daughter (Nam Hong Ju's mom - Nam Hong Ju). The son/daughter is a little crazy and the mom is lovely and supportive the son's problems.