First of all, this game caters to a quite precise fetish, and doesn't do nor attempt ANYTHING ELSE. The Fetish being, you guessed it, <Girls working getting distracted more and more by sex>.
It does it quite well, but if you're not into that, the idea of someone focusing on something getting fucked and it being so good that they slowly lose their focus, then this game will most probably be boring as hell.
That's for a simple reason, even though this game focuses on this unique fetish, its gameplay isn't quite polished.
The fighting system isn't really complicated and is innovative, but the translation messes it up.
Why? Because although the fighting is simple, the translation seems to have been one through MTL. Now don't panic, it's comprehensible, the translator took care to look at the sentences and made sure to use context to guess what they meant and such. But around 60% of lines go beyond the screen, something happening usually with MTL translations, which includes THE TUTORIAL AND FIGHTS INTRODUCTION.
So, although the fighting system is simple (good thing), and innovative (good thing), the translation turns those on its head, changing the innovation into a problem since people can't just bulldoze it like an ordinary RPGM game by spamming a skill that works.
And because people don't like thinking while playing an Eroge (most of the blood needed for their brain to function normally being absent), well they get stuck on the first fight, which by all means should be easy.
A Second problem, is that most of the pleasure from the game, once you're able to win, is experiencing the different effects of the perverse acts of the teachers, like the mind control becoming worse after each fight if you o not cleanse it. Now it's nicely done because you have the option to remove it freely when out of fights using a machine, or keep it for the next fights, where it will gradually worsens the more you do so.
BUT, if you lose a fight, get restrained, and then escape (which will happen eventually because you can only escape or stay restrained until you eventually escape), you'll then be automatically cleansed of all bad statuses no matter what. Winning a fight lets you keep your mind control, but losing frees you, which is quite illogical, and really not helpful if you're trying to build up mind control and such to experience things.
And LASTLY, there's NO RECOLLECTION ROOM, meaning if you want to see the sexy time, you've got to fight, but you have to avoid losing or you'll be cleansed of your bad statuses which bring more sexy time.
Although I suppose in a sense, like so the game forces you to try to win, so people that don't like having to lose might like it.
A little addition : some lines seem to be badly coordinated, in the sense that your girl could be using the line responding to getting brainwashed, even though she's getting spanked, like "STOP STEALING MY MEMORY" after the teacher spanked her.
In conclusion, the game isn't enjoyable for most, unless you are VERY MUCH into that very specific fetish.
...
Which I happen to be, so I'll review it as 4 stars, but keep in mind that this is because I'm completely subjective. Objectively, it shouldn't be higher than 2 stars, and should even be lower.