[Anime]SUMMER WARS

The story centers on high school student Kenji Koiso (Ryunosuke Kamiki), a child prodigy in mathematics who spends his time immersed in OZ, a massive computer-simulated virtual reality world. Kenji is a genius with numbers but ill-adept socially. He secretly has a crush on his attractive senpai Natsuki Shinohara (Nanami Sakuraba) but does not have the courage to tell her. At the beginning of summer vacation, he is asked by Natsuki to help in celebrating her great-grandmother's 90th birthday. Although Kenji does not know the details of the plan, he agrees and goes with Natsuki to her grandmother's estate in Ueda, Nagano Prefecture. Much to Kenji's surprise, he is introduced at the Shinohara family house as Natsuki's fiance.

As Kenji tries to act the part, meets Natsuki's dozens of relatives, and deals with the advances of computer expert Wabisuke Jinnouchi (Ayumu Saito), Natsuki's uncle and "first love", he receives a mysterious e-mail with a mathematics code. He cracks the code and returns it to the sender but finds himself at the center of a developing news story the following day. Overnight, OZ has been hacked and turned into a digital deadzone, and he is the prime suspect. Using Kenji's account and avatar, the real "hacker", which is actually the advanced artificial intelligence system Love Machine, has stripped the virtual world empty and wreaks havoc in the real world. With car navigation systems disabled and computers malfunctioning, Japan grinds to a halt. Love Machine also gains control of a satellite and threatens to send it crashing to Earth. In order to fight back, Kenji enlists the help of Wabisuke, Natsuki's family, and his best friend using an army of avatars. With the fate of the world at stake, a great online summer war takes place.
This story has the part which was created by referencing Wikipedia, so the licence of GFDL is applied to this story.

Mamoru Hosoda
Satoko Okudera
Yoshiyuki Sadamoto
Nobuyuki Aoyama
Tatsuzo Nishida
Akihiko Matsumoto
MADHOUSE
Ryunosuke Kamiki
Nanami Sakuraba
MIZUKI TANIMURA
Sumiko Fuji
Mutsumi Sasaki
Eiko Kanazawa
Mieko Nobusawa
Sakiko Tamagawa
Takuya Kirimoto
Ichiro Nagai
Takashi Kobayashi
Kaori Yamagata
Tadashi Nakamura
BoBA
YUHKI IMAI
Sumire Morohoshi
Mitsutaka Itajkura
Riisa Naka
Ayumu Saito
This description has the part which was created by referencing Wikipedia, so the licence of GFDL is applied to this description.