This webstore right here is where you can find Holiday Star in ENGLISH: http://www.dlsite.com/eng/work/=/product_id/RE107643.html

If you do indeed desire to buy Holiday Star for yourself, but somehow won't end up working for your system because it is an old game as Lady Lucah explained last night, meaning it's mostly for Windows XP and such. If you have anything beyond Windows XP, whether its Windows 7 or some Mac, this tumblr post right here will answer your troubles: http://traumachu.tumblr.com/post/24631327027/hatoful-boyfriend-error-fixes-for-windows

One more piece of advice, if you do going through Holiday Star before Lady Lucah does, same rules apply from Hatoful Boyfriend, NO SPOILERS.

Merry Shuu-mas~! lucahShuu