This OVA was created as a stand alone adventure, so if you're looking for a manga based movie then forget it. The only things that are the same are names of people and locations. The biggest difference in this movie is character relations. People who are friends or would become friends in the manga and TV series are enimies all the way through the movie. I personally like the movie because it gives a fresh perspective on a proven title, but don't go watching this movie expecting certain people to be the same as in the manga and TV series or you'll dissapoint yourself.