This is a 4 page, two player, emotionally heavy game. It's got a tragic vibe, and riffs initially off of Orpheus (the myth, not the game,) but it's not a doomed story. You *can* win, although the game doesn't really prep you on how to do so unless you know the myth.
Doubt Comes In is primarily a storytelling experience, but it has a neat frame to it. You flash back and forth between your characters' lives as a couple, and their journey through / imprisonment in the underworld.
At no point do the mechanics feel complicated or intrusive. They posit interesting situations, and they definitely escalate in intensity and internal conflict, but they never take you out of the action.
Honestly, I think this might be one of my favorite pure storytelling games, and if you have a partner or friend that likes romance and trpgs and complex inter-character relationships against a backdrop of moody almost gothic atmosphere, I'd recommend grabbing a copy.
Minor Issues:
-Page 4, Together, "Why does they let The Lover go?"
-It might benefit from a "don't read all the way through when you're just skimming this, and only read the last section when you get there during gameplay" direction at the start of the game. That last mechanic is strong, but it hits a little harder if the players don't know how it works until the Singer has already made their choice.