Urusei Yatsura Movie 4: Lum The Forever is an anime film that premiered in winter 1986, produced by Studio DEEN.

About the production: the story comes from an original script, the film runs about 95 minutes and its current status is "finished".

Its main genres are comedy, drama, romance and sci-fi, with themes such as Aliens and Denpa.

On AniList, Urusei Yatsura Movie 4: Lum The Forever has an average score of 67%, a good score, and appears on 3,639 users' lists.

Strange things begin happening in Tomobiki Town... When a great cherry tree, "Tarozakura" is cut down while Lum & Co. are making a movie, Lum loses her horns-and her powers! Thus begins the strangest and most lyrical of the Urusei Yatsura movies... (Source: AniDB)

Official synopsis from AniList.