Don't let the dark in

For the Transfiguration Assignment (on the topic of Halloween, and therefore werewolves) at Hogwarts School of Witchcraft & Wizardry (Challenges & Assignments). Prompt used: "Hell won't be so bad, you know. After all, I'll be there to keep you company". Basic gist of this is that someone is turned into a werewolf, but there's lots of things that happen before that so its kinda long