Interesting story, though a bit too shotacon for my personal taste. Young man was bullied a lot because of his different color eyes so he became a shut-in until one day he decides to venture out to look at a flea market. While there he meets a man who refers to people as "humans" and want the young man to work in his shop pretty badly. Obviously the shopkeeper isn't human and possibly the young man too... but we'll see!
Mikazuki Kottouhinten no Kaban Neko