The sexual tension between the two male leads is inevitable even though there will never be a sex scene between the two. Film survives even with just the two characters conversing - a great character study. A sequel is a must.
shareI agree with your first two sentences. Marco Berger said about the movie that the story happens inside the minds of the characters, and I think it's an excelent description. It's a very well made movie that deserves more attention from film lovers, it teaches a lesson or two about how to make a good movie.
But I don't want to see a sequel. I think part of the greatness of this movie is in its simplicity, and a sequel could ruin it by telling more than it needs to be told.