Left and Forgotten

It's Castiel's first day at high school and he's less then excited about it. He meets a new kid in his district and soon they become best friends. But Cas knows something is not what it seems. Cas hasn't brought it up to anyone be he is having horrible nightmares that are way to vivid. Can Cas save everyone stuck in this world?

P.S. I don't own Supernatural... Obviously other wise Destiel would be a canon.