Urusei Yatsura Movie 6: Itsudatte My Darling
English title: Urusei Yatsura Movie 6: Always My Darling
Japanese title: うる星やつら いつだって・マイ・ダーリン
Type: Movie
Source: Manga
Episodes: 1
Status: Finished Airing
Aired: Aug 18, 1991
Duration: 1 hr 17 min
Rating: PG-13 - Teens 13 or older
Studios: Madhouse
Producers: Kitty Films
Licensors: AnimEigo, Discotek Media
Genres: Action, Adventure, Comedy, Drama, Romance, Sci-Fi
Demographics: Shounen

Lupica, another one of the legion of space princesses that all seem to have found out about Earth in some tour book, appears and abducts Ataru! 

But Lupica isn't after Ataru for his great looks or charming personality (because he doesn't have either). Lupica's goal is the greatest love potion in the galaxy, which she intends to use to induce her sweetheart to tie the knot. To get it, she needs the possessor of the greatest lust in the universe...

(Source: AniDB)