- Bonus Material: Both volumes include a small gag comic. The first one involves Maiko attempting to be Hirofumi's assistant, and the second further shows Yuuta and Maiko's exploits at SugoiCon. The author and artist of the series insert themselves into each story.
- Stillborn Franchise: According to a post written on January 27, 2010 at the official blog, the release of Volume 3 will be delayed "due to the state of the manga market and other various circumstances." Later that year, Del Ray Manga, which was previously the distributor, became defunct. It's been over ten years since that post and Volume 3 has never seen print.
Trivia / Kasumi