Nice memories of playing this. All the heroines in general were pretty likeable, the MC wasn't a scumbag, and the ambience in game is also pretty chill. Some routes could definitely be better, specially taking into account that the girls themselves are pretty nice. Some characters definitely deserved a better route due to how likeable they were.
Even if some heroine route could be improved, the main route is still worth it, and surprisingly, the devs were able to remove a bit of the "cliché" of a guy going alone to an all-girls school. Of course it's nearly impossible to remove the "cliché", but in this game it was actually decently written. Same for the ambience in game, you actually feel your in an all-girl school, you can't do whatever you want and fuck everyone, you actually need to follow rules, to behave, which is a nice feel, specially when you engage in a love relationship, going hidden and such.
Finally, the soundtrack also is a plus, they fit pretty well into the scenes.
My main con, besides the minor points I mentioned above is that unfortunely there isn't an harem ending, although I understand it would completly end the major points of the game. I still feel sad to only choose 1 though, due to how likeable the cast is.