As many of you might know, there's an official Japanese wiki, but Koihime player and all round nice guy, [url= https://twitter.com/jotamide]@Jotamide[/url], has started work on an English equivalent here:
http://wiki.mizuumi.net/w/Koihime_Enbu
It's still early days, so if you want to help out, or even just give Jotamide a pat on the back, go find them on Twitter!
Obligatory Promo: On sale in the Autumn Sale now!
https://store.steampowered.com/app/452420/Koihime_Enbu/