Wow, I wish I had listened to the others. This is really quite a bad game. The closest thing to a redeeming feature this game has is the mild amusement that results from the "quiet and pure" girl being given a knife to defend herself, and the resultant stabbing spree - which is sadly overlooked in the actual narrative.
The first and second stages aren't bad - basic, somewhat mediocre gameplay, but not bad. Then the third stage says, "Hey, lets do invisible platforms that you have to hit a switch to land on! And put enemies that you can't hit on a bunch of platforms, who will knock you off into the void if they hit you! And lets make sure the whole thing is kinda glitchy so there's an excellent chance that you'll be kicked back to the title screen if you lose! And we won't do the whole 'stage select' thing either, so enjoy doing the first two boring-as-spit stages again every time we glitch!".
The fourth stage is the closest the game ever comes to a decent stage, but by the time you reach it, you just want the game to be over. And the fifth stage is a really lame boss battle that the game's mechanics simply can't support. It's trivial to beat him down.
The two-characters gimmick isn't even worth bothering with; the plot scenes for the two have nearly no differences, and I can't be bothered with the sex scenes because of the lack of a stage select feature, and never wanting to redo stage three again in this lifetime.
But hey, at least the logic of the game is a bit interesting - why does stage three take place high in the sky, jumping between platform to platform to avoid a painful death by falling, when it's supposedly a rooftop? Obviously, it because this game actually takes place in some non-Euclidean hellscape, and you're really dealing with some kind of demonic sex cult instead of garden-variety perverts. How else does the rooftop connect to the sewer system, which in turn connects to the student council room? That makes no sense from an engineering perspective, and the student council president certainly doesn't have the power to make such changes. And he does have some kind of weird projectile energy attack at the end, and can summon "deliquents" with a single gesture, but doesn't bother calling a mob down on you. Obviously, they're really demonic puppets, and he can only control one at a time.
Mocking aside, though; this game is, at best, a waste of time and bandwidth. At worst, it serves as a remind of what not to do when making an H-action game.