Hyouka is one of my all-time favorite anime, and I'm always happy when I come across a new doujinshi, especially if it features the two main characters.
Unfortunately, most doujinshi about the series follow the same scenario: Chitanda being "curious" about something sexual, and Oreki "satisfying" her curiosity. While this particular work is short and sweet, I'm hoping to find one with a more original plot some day.