Actually, these *are* the two volumes. Bara is often not released the same way as regular yaoi, they are not backed by any large manga publishing companies or magazines. They are often released as original doujinshi at Japanese cons and special yearly comic markets like comiket. This way the mangaka can retain complete control over story boarding and, best of all, keep the art as explicit as they wish. That's why the sex in bara is so detailed and raunchy and doesn't suffer from the dreaded invisi-dick that most yaoi has (seriously, look at the difference between Nekota Yonezou's main works and her side story doujinshi and you'll see a whole lot more uncensored sex). Unfortunately, this means the mangaka is essentially a one person team that has no set release schedule and you will probably have to wait years between each update, especially if creating manga is less a career and more a hobby that happens to make some extra cash. These chapters, as they would appear, are actually volumes. This may not be the case with all bara manga, but mentaiko seems to release chapters as volumes in this manner. Look at Itai Itai Itai, each chapter is stated as volume 1, 2, 3, 4, etc. It's listed as having 4 volumes but only those 4 chapters exist. Sorry to say, but there are no other volumes or chapters for this manga, at least not any that have surfaced online that I've seen. Best place to check is Mentaiko's official websites where you can actually purchase all of the material online.
Could we get an update on this? Only 2 chapters within 3 years is kinda..... =/
There are currently 2 volumes, so there should be a lot more.