The Sister Trap (смешанная)

Draco doesn't know why his twin sister Altaira is so much more popular than he is, so he decides to use a Polyjuice potion to go undercover as her and find out. But the secret isn't that she's a nicer, more likable person; it's that she's promiscuous as could be, and everyone wants to be on good terms with the school tart, as he learns the hard way. For JoeHundredaire.