The game is available for ordering from Peach Princess or J-List, This looks like a GREAT game, I’ll be waiting patiently for my copy (sniff sniff, I live in Japan, so I have to wait longer than anyone else).
Note that we still have the doujinshi for this game and for Private Nurse made by the creator, Deguchi Yosuke. That name is hilarious if you get the joke by the way (you have to be into Japanese doramas).