Dean, the Dangerous, and the Damned

AU Destiel: Sequel to Cas, the King of Karaoke. You should read that story first. One year later: Dean is struggling with a life alone, working a desk job, and managing his personal relationships. All the while, Cas has been rebuilding his life with Lil, compartmentalizing and fixing however he can. Unfortunately, some problems can't be run from, and being alone is solving nothing.