Tricks and Treats

It's Halloween. The day children dress up and go out to trick-or-treat..or at least, most of them do. Ciel Phantomhive, who's quite the perverse child, doesn't see the point to it. So what happens when a certain someone stops by at Ciel's door and wants to go trick-or-treating with him? Will Ciel change his mind about the holiday, or retain his stubborn ways? (This is an AU story.)