Lum and Ataru – A Night only for Two Urusei yatsura : Season 1 Episode 112

Ataru's parents head away for an overnight trip to Atami, leaving Lum and Ataru in the house together. Ataru dreads the prospect of a Lum-cooked dinner, while a horrified Mendo and Lum's Stormtroopers storm the Moroboshi home to protect Lum from Ataru. Ataru tries to kiss her at the last moment, but as a precaution, puts an armor that prevents electricity, in the last frames...he begins to cry.