I recently stumbled on a pair of manga titled 'Animal Girl Games 2' and 'Animal Girl Games 3'. My peerless skill at mathematics and deductive reasoning suggests to me that there must also be an 'Animal Girl Games 1' out there somewhere, but I can't seem to find it...

The series appears to be by someone named 'Shiina Kazuki', and was translated by Doku-Pepper... though whether the first chapter's gotten a translation as well is uncertain. I'd enjoy reading it in japanese too, though, so... anybody know where I can find it?