"HELP, all my interactions are 0%!"
Run the game in Japanese locale. You can do so without switching your entire system locale by downloading Applocale.

"HELP, I get a message saying Illusion software is only available for domestic users over 18!"
Run the game in Japanese locale. Illusion doesn't sell games to international audiences.

"HELP, my question isn't listed here!"
http://www.hongfire.com/forum/forum/hentai-lair/hentai-game-discussion/405533-illusion-artificial-academy-2-%E3%82%B8%E3%83%B3%E3%82%B3%E3%82%A6%E3%82%AC%E3%82%AF%E3%82%A8%E3%83%B32-discussion-and-faq
These guys are wizards and have guides for just about everything.

Sorry I can't offer more. I haven't played in years and our resident tech support specialist has forsaken his waifu in favor of a laifu.