Outside by the Blue, Blue Moon by vaingirlfic.

Slash.

Lo, I have found one of the stories I was looking for. A terrific read, and an amazing job making a fairy tale come to life. Only I’m not sure which fairy tale, it just reads like its based on one. Sam is captured by this demon who insists that Sam stay with him. If Sam does not do so willingly for a month, the demon will kill Dean and Dad. Sam watches his brother and father through the window and agrees. A spell has been cast. Sam must stay for a month, he can never tell anyone, and the horrible horrible spell that has been cast over him can only be broken by someone who loves him. So.

Brilliant. My favorite part is where Dean (natch) is the one who figures it out, not just the spell but how to break it. He relaxes against Sam and says, “I can fix that.” You know. Just like the guy in the movie Holes who grows those terrific onions. “I can fix that.” Well, mabye that’s not exactly what he says, it’s somethnig more along the lines of, “Heck, that’s easy.” There’s a lot of love there between brothers, and I just want to go soak in a whole tubfull of it.