Tenchi the Movie: Tenchi Muyo in Love

Tenchi Muyo in Love IN LOVE ? is a 1996 Japanese animated film and the first of three films set in the Tenchi Muyo multiverse.

The year is 1996, one year after the events of Tenchi Universe. After being defeated by the Jurai Emperor and the Galaxy Police GXP centuries ago, the monstrously powerful Super A1 class criminal, Kain, was permanently imprisoned in a subspace container of the GXPs headquarters. However, Kain managed to escape and used his timespace powers to destroy GXP HQ. He then set his sights on Earth and travels back in time to take his revenge on Jurais royal family. Before the GXP was wiped out, they managed to broadcast a warning about Kains escape, but due to its weak signal, both Kiyone and Mihoshi didnt comprehend the gravity of the situation.At the Masaki house, Tenchi was watching an old film of his mother, Lady Achika, with Ayeka, Ryoko, and Sasami. This was the first time the girls get to see how Tenchis mother looks like when she suddenly vanished from the film. As everyone was tried to understand the situation, the Misaki Shrine, the house, and Tenchi all began to fade out of existence. Coincidentally, Washu noticed a change in the spacetime continuum and quickly devised a temporal shield to protect everyone from the effects of the changed time line. Washu theorizes that someone tampered with the established timeline and wiped out the Misaki family. To prevent Tenchi from vanishing, Washu devised a special temporal net to prevent Tenchi from fading out of time. However, the shield is only a temporary solution Washu sends the rest of the group back to 1970 via a highly experimental time machine to prevent Kain from wiping out the Misaki and Juraian royal family. ........

Source: Wikipedia