KSI

Wouldnt even pirate

May be a pointless suggestion but try renaming the folder (妹いじめ -> Imouto Ijime) Worked for me last time

You can request the patch at their site but its pretty much the same thing as the patch you can easily download anywhere (some tweaked scenes, akiras route which is being translated right now etc.) Oh and I heard they might be getting more translators soon since its pretty much 1 man team atm - 1 translator & bunch of editors

To be fair I would give it a C/C+ at least its little bit predictable and repetitive (promotion parts, god i just cant stand them) but still lots of fun. imo you should give it a go it has tons and tons of quests , really worth a try

Its quite decent in my opinion I have only played two routes so far.Havent tried it with a controller... it has nice art and whats rare is full english patch although its kind of tricky applying it (installing all the updates and whatnot). Story isnt that good but its not bad either, If youre really interested you might aswell just take a look at some gameplay / Kamidori Alchemy Meister Review