A movie about a bunch of Japanese geeks spending their summer at their sci-fi club. As the day goes on, weird things that don't make sense start to happen: things go missing, jokes and conversations that don't make any sense, etc... Then things get really weird when a time machine suddenly appears in their club and from there on it becomes a series of misadventures for these geeks.
Overall this is an excellent comedy/sci-fi movie. The movie proclaims a certain logic when it comes to time travel (ala Back to The Future) and most of the time it does not stray from this logic. The fact that this is accomplished without it turning into a lengthy physics lecture is a great bonus. In fact, the semi-satirical explanation of time travel in this movie is the funniest part of it all.
There are a few familiar faces in this movie such as Juri Ueno from Swing Girls and Yoko Maki from The Grudge. In fact, the overall acting by all of the young but talented cast is superb.
This is definitely one of those movies which has to be seen twice in order for you to connect all the little pieces. No doubt about it, it's a perfect summer flick.