Approaching this from the perspective of a sci-fi enthusiast, I was pleasantly surprised to discover that, despite the complexity of its theories on divergent realities and their harmonic coexistence with dreams, there was a far simpler coming-of-age story that centered on a childhood promise. The score is haunting. The visuals and animation are stunning and the characters are charmingly awkward. Although there are some action sequences and a pint of blood thrown in for measure, the film's pace is decidedly that of a romantic reflection on loneliness and bittersweet affection. In the end, the story telling is adequate, but viewers who were eager to be exposed to fantastic alternate universes will be disappointed.