It plays during the sequel manga chapter 'Eden of Light'. The story begins after Sing introduced Akira to 'Ash' the computer, as she dashes off filled with jealously. Afterwards Sing talks to the computer just like in the actual manga version, but then-
Directly takes part after season 9 of SPN. Crowley speaks to Dean and then they meet somewhere safe. The King will show him the life of a demon, as they experience some things together. Dean realized that he doesn't care about different things anymore, so he makes a move on Crowley. Includes Dean/Crowley and Dean/Castiel. Dedicated to my friend Amber, who inspired me to write this.