Tenchi the Movie: Tenchi in Love!, also known in Japan as Tenchi Muyo in Love! (天地無用 IN LOVE!), is a 1996 Japanese animated film and the first of three films set in the Tenchi Muyo! multi-verse.
The film takes place after the conclusion of Tenchi Universe, and so varies from the original OVAs at several points. Most noticeable of these is the inclusion of Achika as Tenchi's mother instead of Kiyone Masaki. It was followed by Tenchi Forever!, released in 1999.
Plot
After being defeated by the Jurai Emperor and the Galaxy Police centuries ago, the monstrously powerful Super A-1 class criminal Kain was imprisoned in the subspace room of the GP's headquarters, never to be released.
In the present (established to be 1996, the year of the film's release), Kain escapes his bonds, destroys the GP space station, and travels back in time to take his revenge on Jurai's royal family. The Galaxy Police only has time to send a short warning, which Mihoshi and Kiyone intercept.
The Masaki house, the shrine, and Tenchi himself all begin to fade out of existence. Washu theorizes that someone is tampering with the established timeline, and uses a shield to keep Tenchi from vanishing.