I'm giving this one a full mark, despite it being still fairly early on.
There are a couple of issues, which are not critical, but can put off some of you.
First of all, the ghost hunt, is problematic to do. The dev seems quite aware of his mistakes there, and is planning on improving things eventually. For now, it can be skipped, without any penalties on the story, so, it's a minor issue.
Choices are not entirely clear as to what their consequences will be, but the dev has confirmed that route closing will be very obvious, and as such, I'm willing to go on a bit of faith there. You will however potentially, not necessarily have the scene you were hoping for due to that. But, once you're done with the update, you can unlock all scenes and watch them. While it's not ideal, you can still check out the scenes that way.
This game however, does show promises. While it's extremely similar on ideas and setting to "the headmaster", this one has higher quality graphic, story and setting, but a lot less women. It also has a lot less gameplay or things for now, but, it's not as grindy, as this one for now, seems to be entirely story and choice based.
As of now, V 021.01, the MC is nowhere near the perv we have the headmaster, and is generally speaking, just a bit pervy, but nothing out of the norm for someone of that age really. The player has some opportunities to go a bit too far (just my opinion there), but this is only down to the dev wanting to leave that choice and freedom to the player. It is however, hinted heavily that if the player chooses in the future, he'll be able to do a LOT more perverted things.
We only have to hope it does not go from 0 to 200 too quickly, and the MC's developed into it well, but not too slowly either. So far, the story's pacing seems ok to me.
*edit* I've also forgotten that unlike many ANVs these days, the girls are actually nice to look at. The boob sizes are mostly ok, without going full loli or boobs of mass destruction, which is fucking nice refreshing change!