Summer Wars is an anime film that premiered in summer 2009, produced by MADHOUSE.

About the production: the story comes from an original script, the film runs about 114 minutes and its current status is "finished".

Its main genres are action, comedy, drama, romance and sci-fi, with themes such as Family Life, Virtual World, Ensemble Cast and Rural.

On AniList, Summer Wars has an average score of 77%, a very good score, and appears on 116,626 users' lists.

When timid eleventh-grader and math genius Kenji Koiso is asked by older student and secret crush Natsuki to come with her to her family's Nagano home for a summer job, he agrees without hesitation. Natsuki's family, the Jinnouchi clan, dates back to the Muromachi era (1336 to 1573), and they've all come together to celebrate the 90th birthday of the spunky matriarch of the family, Sakae. That’s when Kenji discovers his "summer job" is to pretend to be Natsuki's fiance and dance with her at the birthday celebration. As Kenji attempts to keep up with Natsuki's act around her family, he receives a strange math problem on his cell phone which, being a math genius, he can't resist solving. As it turns out, the solution to the mysterious equation causes Oz, the program that controls nearly every aspect of life to be hacked into, it's up to Kenji and his new "family" to stop the hacker before it's too late. (Source: twitchfilm.net)

Official synopsis from AniList.