Well, this story really surprised me in a positive way. Usually when I start reading a fanfic this short I don't get my hopes up too high since a lot of them are rushed, ordinary, contain a lot of basic mistakes and are generally badly executed. However, none of this is true for your story.
It was entertaining to read, kept the characters in character, you picked a topic to write about that certainly is not overused and overall this is one of few very short fanfics that really wouldn't have needed any more words than you gave it.