Urusei Yatsura S01 E92 Bottled Letter Seashore Mystery!

"Grab her horns and she might just become your darling!"

After Ataru, Ten, and Mendo fall for a beautiful woman's love letters - which end up luring them (along with Lum and Shinobu) to the inn she works in - they stay at a creepy inn, where the residents quite literally want them for dinner.