Betelgeuse, Betelgeuse, Betel...Oh Shit

Purebloods have a weird fascination with stars, and a couple students decide to summon a demon without properly looking into the consequences.

AKA, Beetlejuice is accidentally summoned into Hogwarts through the unfortunate coincidence of a student also named Betelgeuse. Shenanigans ensue. Also took the liberty of what constituted as "unbroken."