Summer Wars [4K Ultra HD Blu-ray] [Steelbook]

An adolescent math wiz unintentionally plunges the virtual world into chaos by solving a numerological riddle that makes the global network vulnerable to attack in this animated sci-fi adventure comedy. When Natsuki asks Kenji to pose as her boyfriend at her grandmother's upcoming birthday party, the smitten young numbers man jumps at the opportunity. But his summer of romance takes an unexpected turn when Kenji receives a complex math riddle on his cell phone, and solves it without a secon...