Manic Pixie Monster a.k.a. Never Go to the Second Location: The Golden Ball by Agatha Christie

We have been here before, and we will almost certainly be here again. It's time for another kookily "romantic" story in which two young things banter their little hearts out to what seems to be to them--if not us--a satisfying conclusion. It's Listerdale Mystery time, and good God but this one hinges on a piece of fruit, too.