It won't do you much good, because this game doesn't really have such a thing as a "full save". There is no recollection room, because there aren't any of the static CGs you collect in simpler eroges. The sex happens through the combat system, with full game mechanics going on. Even side jobs and masturbation scenes and post-defeat penalty things are actually heavily modified "combats" with different actions available.
And since Karryn's stat progression isn't just a linear chain of levelups, every endgame save file you could borrow will have a different build to it, focusing on different abilities and providing different options. Several of the passives are mutually exclusive too. I suppose somebody might be able to give you a post-ending save file with all the possible Titles in it, to give you an accelerated NG+? But the value here really is in playing the game, not in reaching the end point.