Summer Wars

Trama

Kenji Koiso, a timid eleventh-grader and math genius, is asked by his older schoolmate Natsuki to accompany her to her family's home in Nagano for a summer job. Upon arrival, Kenji discovers the "job" is to pretend to be Natsuki's fiancé for her eccentric family, the Jinnouchi clan, who have gathered to celebrate the 90th birthday of their matriarch, Sakae. While navigating this unexpected role, Kenji receives a mysterious math problem on his phone. His attempt to solve it inadvertently causes a virtual world called OZ to collide with reality, jeopardizing society and the entire world.