I remember reading a few chapters of a Japanese manga about 3 years ago, but my memory of it is very hazy. The story was not current and had been in production for several years already. If I had to guess, it started serialization around 2010 or earlier, but the artstyle implies 2000s.
There's a character who gets lost in the woods, wanders around and finds this small shack with a young male hermit living there. The "hermit" had light hair, I think. The inside of the shack was mostly filled with bookshelves. The two characters had long-winded conversations about something fantastic or philosophical.
I know this isn't much to go on, but I'd really like to read it.