Would you happen to have the first game in this series? I was able to find the second (thanks to you) and the third, but not the first unfortunately.
Here's a link to the thread you had posted.
http://www.anime-sharing.com/forum/hentai-ovas-36/japanese-%5Bnew-release%5D-%E5%90%8C%E4%BA%BA%E3%82%A2%E3%83%8B%E3%83%A1-%5B2011-11-26%5D%5Brj085636%5D%5Bseismic%5D-%E3%81%82%E3%81%BE%E3%81%BE%E3%81%BF2-%5B1313m%5D-33454/
Here's a link to the thread you had posted.
http://www.anime-sharing.com/forum/hentai-ovas-36/japanese-%5Bnew-release%5D-%E5%90%8C%E4%BA%BA%E3%82%A2%E3%83%8B%E3%83%A1-%5B2011-11-26%5D%5Brj085636%5D%5Bseismic%5D-%E3%81%82%E3%81%BE%E3%81%BE%E3%81%BF2-%5B1313m%5D-33454/