This game is really bad. I couldn't finish it, I dropped it after reaching about 85 "nasty" points out of 100. So I guess I saw most of the game at that point.
This game has its own "gimmick". Have you ever found secrets in video games? Maybe you stumbled onto a secret route in the woods by mistake? Or perhaps an NPC gave you a tip about where to find a secret treasure, and following the tip, you stumbled upon it yourself?
Well, someobdy made it the entire game's fucking point. You MUST collect the wackiest items imaginable to raise your "nasty" level, which in turn allows you to progress further into the game. To get more of those points, besides having the main character have sex, you'll also have to find dirty journals that can be hidden anywhere. And I do mean it - random crack in a warehouse wall, a random trash bag, not-so-obvious path hidden behind a girl. And these are only a few examples, there are way more.
Art in this game is the only good thing I can say about it. It's pretty simple, without much details, but done in a very good way. I especially enjoyed the main character and her cold expression. Sex scenes are pretty decent, too bad they don't seem to be replayable.
You are not at all guided by the game. Without a guide, I doubt someone could successfully complete the game. Some moments can even lock you from further progression. As example - a cabaret segment can be messed up; all it takes is one mistake. You won't realize it at first, though. You'll keep playing until you're up against a wall, that cannot be overcome, because you lack some "nasty" points that you didn't get in the cabaret.
The way you unlock new locations is also poorly executed. From the start you can visit only few places - home, school, station and some neighborhood. You can also unlock downtown, but other locations won't be as easy to access. You won't have much trouble at first, if you just talk to every person on the screen, because that's exactly the way to access slums and town's business area. The worst location for me to unlock was mansion, because you won't be able to reach it without finding a lost baseball cap. To find the cap you'll need to fend off some insect. In order to do that you'll have to find lots insects hidden all over the map. And in order to even start the quest you'll have to stumble upon the entrance to the shrine. And not just that, but you should do that at night, when there's a bug catcher that has a quest for collecting the bugs.
Another problem that I had with that game is that it just looves wasting my time. In order to complete the cabaret quest, you must first go to sleep, wait until nighttime, leave your home, travel to downtown, travel through the entire downtown, travel to a slum, travel through the entire slum, enter the cabaret, complete the quest, exit the cabaret, travel back through the slums, travel to downtown, travel back through the downtown, travel to your home, and finally go the bed, and repeat the entire sequence 2 more times later. And as I mentioned bofore, this part can be messed up. I know that I did mess it up, so I had to the whole segment 6 times total. And you won't even know that you've made a mistake. The cabaret quests have you talk to customers and answer their questions, if you do that correctly a heart message will appear. If you did everything right, or messed up, either way you'll get the same amount of money for the night. Besides cabaret you'll have to visit school for about 7 times to start school fair. Going to school consists of you going to your class, then, after a short black screen you'll find youself in the classroom with lesson already over. It seems completely unnecessary besides the day one, because the school fair wasn't ever mentioned in the game afaik.
Overall, this game is a 2/5 at best, with only the visuals doing some heavy lifting on that score. Due to the fact that you cannot even replay sex scenes, playing the game without any guidelines is its own kind of torture. Don't recomend the game.