Kenji Koiso, an eleventh grade math genius, agrees to take a summer job at the Nagano hometown of his crush, Natuski. When he arrives, he finds that her family have reunited to celebrate the 90th birthday of the family matriarch. His job is to pretend to be Natsuki's fiancé. Meanwhile, his attempt to solve a mathematical equation causes a parallel world's collision with earth.... (Full plot summary below)
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| Movie Source | Available | Offers | Added | Views | Quality | Format | Rating | Link | Share |
|---|---|---|---|---|---|---|---|---|---|
 | UK only | 1 Month Free Trial | 20 Apr 2020 | 2836 | HD | Watch OnlineStream Instantly | 86% |  Report: Broken Link |   |
| USA only | 1 Month Free Trial | 10 Jan 2019 | 5721 | HD | Watch OnlineStream Instantly | 85% | Report: Broken Link | |
| IRELAND only | 1 Month Free Trial | 09 Apr 2025 | 4305 | HD | Watch OnlineStream Instantly | 88% | Report: Broken Link | |
 | UK only | 30 Day Free Trial | 06 Sep 2020 | 964 | HD | Watch OnlineStream Instantly | 81% | Report: Broken Link | |
![Its HD [Summer Wars]](/images/logos/icons/itshd.png){kind=icon} | WORLDWIDE | ? | 29 Mar 2024 | 3001 | HD | Watch OnlineStream Instantly | 85% | Report: Broken Link | |
 | UK only | 30 Day Free Trial | 29 Apr 2017 | 226 | HD | Watch OnlineStream Instantly | 45% | Report: Broken Link | |
 | UK only | Free Credit | 26 Sep 2016 | 138 | HD | Watch OnlineStream Instantly | 38% | Report: Broken Link | |
 | WORLDWIDE | ? | 23 Feb 2016 | 80 | HD | Watch OnlineStream Instantly | 27% | Report: Broken Link | |
 | WORLDWIDE | ? | 29 May 2023 | 25 | SD / TV | Watch OnlineStream Instantly | 11% | Report: Broken Link | |
 | WORLDWIDE | ? | 06 Dec 2025 | 98 | HD | Watch OnlineStream Instantly | 30% | Report: Broken Link | |
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| Movie Source | Available | Offers | Added | Views | Quality | Format | Rating | Link | Share |
|---|---|---|---|---|---|---|---|---|---|
| UK only | 30 Day Free Trial | 12 May 2013 | 2987 | SD / DVD | DVD RentalRent by Post | 70% |  Report: Broken Link | |
 | UK only | N/A | 12 May 2013 | 100 | SD / DVD | DVD RentalRent by Post | 46% | Report: Broken Link | |
 | USA only | 1 Month Free Trial | 12 May 2013 | 239 | SD / DVD | DVD RentalRent by Mail | 17% | Report: Broken Link | |
| USA only | 1 Month Free Trial | 12 May 2013 | 20654 | SD / DVD | DVD RentalRent by Mail | 77% | Report: Broken Link | |
| Movie Source | Available | Offers | Added | Views | Quality | Format | Rating | Link | Share |
|---|---|---|---|---|---|---|---|---|---|
| UK only | 30 Day Free Trial | 30 May 2016 | 236 | HD / BR | Blu Ray RentalRent by Post | 83% | Report: Broken Link | |
| UK only | N/A | 30 May 2016 | 91 | HD / BR | Blu Ray RentalRent by Post | 21% | Report: Broken Link | |
| USA only | 1 Month Free Trial | 12 May 2013 | 753 | HD / BR | Blu Ray RentalRent by Mail | 8% | Report: Broken Link | |
| USA only | 1 Month Free Trial | 30 May 2016 | 5474 | HD / BR | Blu Ray RentalRent by Mail | 82% | Report: Broken Link | |
Kenji Koiso, an eleventh grade math genius, agrees to take a summer job at the Nagano hometown of his crush, Natuski. When he arrives, he finds that her family have reunited to celebrate the 90th birthday of the family matriarch. His job is to pretend to be Natsuki's fiancé. Meanwhile, his attempt to solve a mathematical equation causes a parallel world's collision with earth.
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