I thought mine would be Yosuke's after Chie wanted to eat him, but I think Yukiko's is kind've amazing with the boxed lunch thing. It starts off serious and just goes crazy lol, "people can still swallow they're asleep right?".
EDIT: Wait that didn't complete her story? Did that choice cause it to go off the rails in a crazy way like that? Well even so I recommend it if you haven't seen it, just choose to try the food in Yukiko's first choice.