Summer Wars (2009)

Japanese high-school student Natsuki travels to the countryside to celebrate an elderly relative's 90th birthday. She drags mathematical genius Kenji with her, posing as her boyfriend; it's a role that Kenji would love to fill for real.
A high-tech online world (named OZ) features alongside a traditional and pastoral offline family-focussed world. The network of 4 million communities (1 billion users) is contrasted with the small network of family and friends that help and protect one another, highlighting how individual strengths and group strengths can support each other in times of crisis.
The virtual world's vibrant energy and explosion of colour is memorable, but I prefer the simplicity of Hosoda's previous work, TGWLTT (2006).

3 squeamish ossifrages out of 5