Interesting main idea, but parcially wasted

The main idea is great, interesting, funny, powerfull.
The coment about the people´s loneliness (very common in japanese movies) is good.
But in the middle of the movie the writer dind´t know what to do wiht this idea and the movie roll down.
This is a pitty because the story and the characteres in general not was well develop.

Oscar
Hablo mejor español :)