A dazzling movie by the best director Studio Ghibli ever let go, this is both visually delicious and solidly plotted, combining age-old romantic and family drama with terrifyingly possible technology.
High school maths genius Kenji is offered a summer job by Natsuki, the hottest girl in school. What he doesn't know is that he's being hired to be her fiancé for a family gathering to celebrate her grandmother's 90th birthday. But there are bigger problems than his.
The prodigal son is also coming home, bringing his past with him. This includes an AI named Love Machine, sold to the US military, that lures Kenji into exposing his online accounts with an irresistible mathematical puzzle.
As Love Machine wreaks havoc on the area's electronic infrastructure, the family band together to help Kenji defeat it. But when it recovers and threatens to drop an asteroid probe on a nuclear power plant, it's going to take a lot more than family to stop it.