This suffers from some of the big sandbox woes seen time and time again:
The first is the most jarring, it drops you into the sandbox with too little information. It's amazing what even a 2D map of the school could do for letting players at least feel a little less lost. You're also not given direction, first couple days in the office I just advanced time expecting something to happen, went to the map eventually but didn't see any of the frames giving feedback on why I should even go there (and getting chastised for entering a shower room that didn't tell me it was the girls locker room). She tells you you're the counselor and in charge of punishments, but then you just kinda find yourself sitting in your "room" looking bored with no actual explanation of what you're supposed to do. In a logical world you would sit and wait in your office for further instruction, or go to your bosses office and ask for what you're supposed to be doing.
The first part bleeds into the second, sandbox style games have a problem where characters might be seen before they're known, usually every character has SOME kind of introduction cutscene. A "???" nameplate until they tell you their name, it might be simple and two lines of dialogue with a generic pre-render, but you're pretty much always given this. Ultimately I think this game just breaks and throws girls at locations in the sandbox before you get this chance.
This leads into the next with scenes ending before they logically would, you walk into a library with your sister (in law?) crying. Now even as a normal guy I would say there's no way that I would do that, I would prod and poke and try to at least make sure that she needed my space, I would probably also spend a moment making sure she wasn't physically hurt. But this guy is a counselor, sure a bad one, but it's literally his job to go to a crying student and make them feel better, and this guy is also horny as fuck for his girlfriend's sister, so you can't tell me at the very least he would take the opportunity to look closer at her exposed panties. This is how most of the scenes work out, you navigate a janky menu to go to places around the school, most of the time given "nobody's here" messages and the few times you do hit "somebody" it's mostly scenes like this... Where your character walks away from a scene that should at the very least demand another textbox worth of attention.
Then there's the time you finally find a "real" scene, you'll quickly realize this is the "only one good route" style of design, it might even give you several choices you have to make (IE the weird "i gotta piss, o fuck the principal finally brought me something to do, is this gonna be a fucking piss fetish thing?") There's a correct answer to every step and if you miss a step you might be given a glimpse of a lewd render but then the scene ends, and most of the time the endings are jarring (like when you choose the wrong one with these two and it basically just smash cuts to "evening" outside your apartment.) The worst part is that some renders are only seen if you choose the "bad end" choices.
All in all, I would say "nah" to this, whatever you're looking for other games already do it better, to say this game is incomplete is like calling pong a 3D Open World RPG, sure maybe you could torture the definition of something to be accurate but the reality is you're not even in the right ballpark.