The Year Harry Potter Arrived and Ruined Everything-Editing

[ACTUALLY EDITING IT] For two years of one Slytherin's time at Hogwarts, there was no Harry Potter, there was no Draco Malfoy, and there was no Voldemort trying to get into the castle every two or so months. Suddenly though, everything changes, and that Slytherin knows who's responsible: Harry Potter and his worst enemy, Draco Malfoy, but for her, it's mostly Malfoy.