While performing in a student film, Ataru cuts down Tarozakura, a large, ancient cherry tree. Strange things begin to happen all across Tomobiki: a mountain appears out of nowhere, spring changes to winter, and Lum loses her powers, while those around her act as if she doesn't exist.
Unfortunately the movie Urusei Yatsura: Lum the Forever is not yet available on HBO Max.
| Directing | Kazuo Yamazaki | Director |
| Writing | Kazuo Yamazaki | Writer |
| Writing | Toshiki Inoue | Writer |
| Visual Effects | Tetsuya Yamamoto | Key Animation |
| Visual Effects | Junzo Chiba | Key Animation |
| Visual Effects | Shinichiro Minami | Key Animation |
| Visual Effects | Yoshiyuki Kikuchi | Key Animation |
| Visual Effects | Yasunao Aoki | Key Animation |
| Visual Effects | Toshio Takahashi | Key Animation |
| Visual Effects | Ichiro Hattori | Key Animation |
| Visual Effects | Shigenobu Nagasaki | Key Animation |
| Visual Effects | Hirohiko Yamada | Key Animation |
| Visual Effects | Atsushi Matoba | Key Animation |
| Visual Effects | Hiroyuki Takagi | Key Animation |
| Visual Effects | Atsuko Nakajima | Key Animation |
| Visual Effects | Takeyuki Suzuki | Key Animation |
| Writing | Rumiko Takahashi | Comic Book |
| Art | Torao Arai | Art Direction |
| Visual Effects | Hideki Takahashi | Animation |
| Visual Effects | Osamu Tsuruyama | Key Animation |
| Visual Effects | Akemi Takada | Character Designer |
| Visual Effects | Futoshi Fujikawa | Key Animation |
| Visual Effects | Satoshi Takeshima | Key Animation |
| Art | Jun Okabe | Background Designer |
| Visual Effects | Tsukasa Dokite | Animation Director |
| Crew | Rumiko Takahashi | Creator |
| Visual Effects | Kumiko Takahashi | Key Animation |
| Sound | Bun Itakura | Original Music Composer |
