This is the one that exists mostly because Urusei Yatsura hit ten years on air, and it shows. The plot is a mess of contradictions that fans still argue about. What saves it is the same thing that's always saved this franchise: Ataru and Lum's dynamic works even when everything else falls apart, and watching them navigate Lupica's chaos feels like catching up with characters you've known for a decade.
Another space princess shows up on Earth with a scheme: she needs Ataru kidnapped. Not because she's after him, but because he's the key to getting what she really wants. Turns out the galaxy's most potent love potion requires someone with the most powerful desire in the universe to create it, and Ataru's legendary lustfulness makes him the perfect candidate. The princess plans to use that potion to finally win over her crush and seal the deal on marriage. What follows is a chaotic journey across space where Ataru gets dragged into someone else's romantic crisis. The chaos that erupts when a desperate alien princess, her lovesick schemes, and Ataru's complete inability to take anything seriously collide makes for the kind of absurd comedy the franchise thrives on. Romance, sci-fi action, and slapstick humor collide as Ataru tries to escape while everyone around him gets caught in the fallout. It's pure Urusei Yatsura: ridiculous premise, sincere emotions underneath, and nobody getting what they actually wanted.