Firstly, the best thing what the movie describes through its simple realistic storyline is that, you fall in love and it is unconditional. love is not something that is forced but something that happens with time.
Secondly, support for each other.
Third, Trust
The thing which I loved the most was that it is not a movie that is complete. The writer wants us to interpret in our own way. This is what that makes a story more beautiful ........... love is eternal.