Asian movie.hero and heroine live in an apartment.1a ,1b or something,they don't see each other.but they have been in love since childhood.he is a musician and she is a writer.. I think... mostly a korean or taiwanese movie.hero has long hair in the movie... thank you.my girlfriend likes the movie.plz help me find it.
NOTE:they love since they see each other with their school ID's in the past and relate it in present.