Remus Lupin had a pretty fantastic few years after his Hogwarts Graduation. How exactly did he become friends with Magneto and Professor X, back when they were Erik and Charles? This is his story, the story of the boy they knew as Moony.
Lily is suddenly thrown into a world of mutant abilities after she accidentally kills her parents in a house fire, while in the process alienating her sister. She has no one and doesn't want to be close to anyone, in fear that she might hurt them. What will happen when she can't find the light within herself to continue? X-men crossover HP (Lily x James later on)
Things are tense between Harry and his roommate, Artie Maddicks. Harry avoids Artie and Artie is miserable about it. Flea can't stand it, so when Harry refuses to respond, Flea takes matters into his own hands. Nothing like a little public embarrassment to forge a bond, right?