To counteract the tooth-rotting sweetness, you probably need to go watch When the Levee Breaks or an episode of Game of Thrones or Sons of Anarchy.
This is crying out for a version with torturer!Dean, soulless!Sam and LeviaCas as part of the Moments We'd Rather Forget collection. I'm not sure how they'd come out in pastels though. There's a challenge for someone else. Bobby'd probably look pretty good this way too.