Tenchi Forever! (1999)
Original title: 天地無用! in LOVE2 ～遙かなる想い～
Tenchi Forever! is a 1999 Japanese-language animation movie directed by Hiroshi Negishi, with a running time of 1h 35m. It stars Masami Kikuchi, Ai Orikasa and Yumi Takada.
One day, Tenchi disappears in the forest near his house. Six months later, Ayeka and Ryoko locate Tenchi living in a city, but with a mysterious woman. What's more, Tenchi appears to have aged several years. Whenever Ayeka and Ryoko catch up to him, he disappears into thin air, apparently existing in a fabricated alternate dimension where he has no knowledge of his past.