I watched it last month with my friend.
I really liked it. The graphic was great and the whole movie was very balanced. There was a lot of plot in such a small amount of time, but they still managed it very well.
Spoiler
Oh, but I'd personally wouldn't like it if it went longer after their meeting in the end. I see no need for it, since we all know what's going to happen. And I'm not much of a romance fan
As for something similar, right now nothing comes to my mind. But my friend said it reminds him of some other movie, since they have a similar setup. But it wasn't an anime, and I haven't seen it and don't remember the title anymore.