Not really sad, but probably one of the most touching scenes in Ah! My Goddess was in the manga, chapter 48 (The Forgotten Promise). It always get me.
The motor club goes on a retreat to an old resort, and there is a ghost there who thinks Keiichi is his grandfather. They find the bike K1's grandfather left there, because he had promised to give the ghost a ride on his bike around the lake, but she had died before he could keep the promise. So K1 fixes the bike, and gives her a ride around the lake, freeing her spirit. In the end, he leaves the bike, and Urd asks why. K1 explains that he isn't his grandfather, and that the promise hasn't really been kept... that's why the bike stays. It ends with a "voice over."
"It's still there you know. A Brough Superior in an old resort hotel by a lake. A bike, and a promise... waiting forever."
Larry
19-Feb-2005