Urusei Yatsura S01 E111 Enraged Lum-chan!

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

After Ten burns Lum's scarf she made especially for Ataru, he's forced to do something he's never really done before - apologize. And Ataru is making sure to drag this out as much as possible, even convincing Lum to get angry at him.