One of my all-time favorites. I've read the novels, watched the anime, have all nine volumes of the manga at home, read doujinshis and fanfictions but I still can't get enough of it. What I love about No.6 is that the relationship between the two boys (which is sweet but very complicated)isn't the main point of the story. It is a big part of it but isn't the only focus and co-exists with a much larger narrative. It has left a big impression on me and I keep getting back to it
Pure smut and funny as hell
Rakuda Tsukai To Ouji No Yoru