I'm about to write a story involving, for the most part, just two characters. There isn't really an antagonist anywhere, although one could perhaps count the setting itself as that, and most of the other people they meet they don't really get to stick with very long for one reason or another. So, how does one keep a story with just two characters for the most part interesting? By giving them lots of depth? Or just insuring their situation is interesting enough to distract from that? I have seen this done before in the Road, and... well, I didn't particularly love how it worked out there. So, thoughts?