The Overland twins at Hogwarts (a Jack Frost and hogwarts fanfic)

So, Jack Frost and his twin brother, Caleb, the infamous Overland twins. They are now attending Hogwarts, where they meet Cassie, a young witch who hasn't got a clue as to who her parents are, but they become fast friends. This is about their adventures together in hogwarts! (Yes, I suck at descriptions.)