Ano Natsu de Matteru(2012)

When a group of friends decide to make a movie over a long summer holiday, they end up learning a little about filmmaking and a lot more about each other and themselves. What begins as a simple way to avoid the summer doldrums quickly turns into something much more complex, intimate and revealing, as the maturing relationships between the members of the young cast take on new, and sometimes very unexpected, turns.

(Source: Sentai Filmworks)