That was amazing~ o.o It was a really touching story.
I really liked the way you put the camera, signs and stuff in there so that it looks like it was part of the scene originally~
The ending was so sad though @__@
And yeah, 5cm per second is kind of like this too. Look for other animes by the person who did 5cm per second (forgot name Dx) A lot of them are about distances between people.