After HBP. The Knights of Walpurgis, predecessors of the Death Eaters, have raised their heads after Voldemort's demise. Autumn 2005 isn't going to turn to a peaceful winter after all, especially after Draco gets one injured Harry Potter under his roof.
HD. Harry and Draco end up having an eventful, interesting night at Hogwarts after witnessing something they'd rather not have witnessed. Arguments, pet ferrets and bonding. Slightly AU since HBP.