It was Halloween at Hogwarts, and James, Sirius, Remus, and Peter have the perfect costumes planned. Even though it wasn't tradition to dress up, the boys had anyways, of course. Sirius had picked out all of their outfits, props and accessories included. He was going as a dog, James was a stag, Peter was a rat, and Remus had the best costume of all. Yup, you guessed it, a ware-wolf. As the four walked through the castle, knocking on random classroom doors, interrupting class, and saying TRICK OR TREAT, they made an interesting discovery. Professor McGonagall was wearing cat ears.