Summer Wars

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)

Episode List (1)

Family Life 91% Virtual World 91% Artificial Intelligence 87% Ensemble Cast 83% Software Development 79% Rural 74% Male Protagonist 70% Terrorism 70% Coming of Age 62% CGI 62% Female Protagonist 60% Card Battle 56% Heterosexual 54% Military 50% Alternate Universe 48% Robots 48% Fake Relationship 45% Tanned Skin 45% Work 44% War 44% Kemonomimi 42% Space 40% Estranged Family 40% Anthropomorphism 40% Matriarchy 40% Baseball 33% Revenge 32% Gods 20%