Boot Camp.

Boot Camp: By definition it is a camp to train recruits. And that's just what this is. James, Remus, Sirius and Frank are thrown into the unknown when McGonagall tells them that they have been signed up, practically conscripted, for a specialist class. If you add one muscle man, one strict trainer and a certain enigmatic red-head into the mix what do you get? A shared living Hell for you and your friends.