specific Good Boy King of Hell!Sam

[sanna_slytherin]

I am looking for a specific fic where Sam is the King of Hell. I remember that he chooses to become King of Hell, and Dean condemns him for it. Bobby does not abandon him though. The only other thing I remember is that Sam goes back to Stanford and graduates, and that Dean comes to Sam's graduation along with Bobby.

Anybody recognize the story? (Also, why is there no 'king of hell' tag?)