Urusei Yatsura Movie 6: Always My Darling

Synopsis:

Princess Lupica's quest to find the most lecherous man in the universe leads her to Ataru, whom she abducts to obtain the most powerful love potion in the universe. Will her schemes to marry the tofu man go according to plan, or will Ataru make a few conniving plans of his own to use the potion to create his longed-for harem? Lum pursues her abducted darling with the aid of Oyuki and Benten, but will they make it in time before everything goes awry?