I thought I'd post this for anyone who wants to play this game . . . six years later or whatever. The installer in the iso file doesn't work without setting the Windows clock back. Took me forever to find this out -- official link is here: (FAQ - Tennenouji) It's the first item in the FAQ. Translated, it tells you to set your PC clock to sometime in 2015. I set mine to April 2015 and voila, installer works.
