Story and characters are adorable. Cinematography and music timing is also pretty impeccable. The sizzling chemistry between Kim Soo Hyun & Jun Ji Hyun propels the drama into another dimension, and arguably, there are no other actor/actress that could play these lead roles so well as they brought the quirkiness of the characters to life. Some loopholes/questions remain unsolved though. It seems like a hodgepodge of secondary characters and events skimming the surface with not enough backstory, thrown in for convenience sake. Not as airtight or compact as it could be and a little drawn out at the end. This is more of a drama that tugs at the heartstrings rather than cater to logical reasoning (even on the non-fantastical elements).