Now the apocalypse has begun and Lucifer is free to walk the Earth yet again, it is easy for Castiel to think that they are in a losing battle. That is until Castiel stumbles upon Dean's future self who teaches him, that even in the worst of times, it is never too late to regain your hope. But the problem with gaining hope, is that you can lose it again.

Dean/Cas, multichapter, slight AU. Dean's busy trying to re-soulify his brother, but Cas needs help. Maybe it's time Dean gave it to him. Ch. 15: Dean glared indignantly. "I find the term 'lovebirds' to be offensive. We prefer to be called 'sex-falcons.'"