Hmm i think there is one in the Yukkuri Fanfic Group but i'm not sure, it does have a lot of links and dlls, though i think there was a comment posted with a link in some game related pics, maybe you should search through the "game" tag?
Just to make it clear, Abuse is possible in this game. 3 different stress levels of actions are available. Chaos Normal Low
There's this mini event you can do with Marisa where you give her a sui. If her stress is low, she gets a smooth ride. If it's in Chaos, you slam her into the wall. To be fair, she tells you to get off your ass and push her if it's in chaos
...Harouki, since it appears that you've played the game, do you know what errors 2 and 3 mean? On google, someone said something about version 1.0c being released, but I don't see the relevance of that (assuming that it's an offline game), and I can't find it anywhere either :(
I don't know anything about a C version. I only have the B version. This game probably needs japanese locale to run properly, and since pretty much every game I play is of japanese origin i've set my computer permanently that way so I wouldn't know if it's required or not.
You can probably google to find out how to set the locale since I am unable to explain things properly most of the time unless i'm there personally to do it step by step.