Urusei Yatsura: Only You

When Lum finds out everyone in Tomobiki has been invited to Ataru's wedding-and she isn't the bride-she flies into a rage. Years ago, Ataru played "Shadow Tag" with a girl named Elle and won, not realizing she was an alien princess. On her planet, stepping on a girl's shadow means you have to marry her. Now Elle's envoy has arrived to enforce the promise. Lum's furious, but her electric shocks can't reach Ataru-he's protected by a force field. Her friend Benten proposes a solution: beat Elle to it by forcing Ataru into a wedding themselves. So they kidnap him and all the guests, setting the scene for the most chaotic shotgun wedding imaginable.