Paranoid (Sirius Black- Remus Lupin)
Where the Marauders find themselves in a crisis against a Slytherin. The brilliant witch doesn't know how or when a group of four idiots decided she would be their enemy during their sixth year. Maybe because she looked at one of them the wrong way, or maybe they just perceived it that way.
Because how is she supposed to get through her sixth year without getting involved with those idiots