★ 7.3 Movie
BELLE
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… Read more
Storyline
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)
Trailer
Characters & Japanese Voice Cast
Kazuma Ikezawa
Main
VA: Mitsuki Tanimura
Natsuki Shinohara
Main
VA: Nanami Sakuraba
Kenji Koiso
Main
VA: Ryuunosuke Kamiki
Sakae Jinnouchi
Main
VA: Sumiko Fuji
Wabisuke Jinnouchi
Main
VA: Ayumu Saitou
Love Machine
Supporting
Mansuke Jinnouchi
Supporting
VA: Ichirou Nagai
Shingo Jinnouchi
Supporting
VA: Yuuki Imai
Riichi Jinnouchi
Supporting
VA: Takuya Kirimoto
Katsuhiko Jinnouchi
Supporting
VA: Mitsutaka Itakura
Takashi Sakuma
Supporting
VA: Takahiro Yokokawa
Mariko Jinnouchi
Supporting
VA: Mieko NobusawaSimilar Anime
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Frequently Asked Questions
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Summer Wars is produced by MADHOUSE.
Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 20 October 2026, 4:42 PM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].