Japanese title: ぴことちこ ショタアイドルのオシゴト 
English title: Piko to Chiko: Shota Idol no Oshigoto 
Circle: Tinkorbell 
Release date: 26 Nov 2010 

Serial: 
4192-7572-6735-7589 

NOTE: The game will only run if your OS language is set to Japanese. Changing just the system locale to Japanese is NOT enough to run the game. So you either have to download the Japanese language pack for your OS, install and activate it, or install a Japanese Windows XP as a Virtual Machine. 



Special thanks to ult_combo for all the information above and also for the game! It is very hard to find it