The game used to have loli's but the dev caved to pressure and censored the game, remaking some models and aging them all up.
Maybe yes, maybe no. Personally I just do think he wanted to please everyone, but at the same time he didn't have goals to be seen as a "loli dev", which your comment seems to imply it.
Basicly games based on schools will always have that issue, even if that isn't the dev's goal. And yes I do agree the "pressure" is bullshit, even if that content isn't my cup of tea, but it's the way it is.
Personally I love the game the way it is. The only thing I might feel a bit "meh" about it is the amount of characters along with the theme. You're supposed to be a teacher and punish all classes, but in the end the game feels as if only 1 class is around. It sucks though, at some point having more girls around would give a sense of realism (simply in that presentation hall), but at the same time, adding more and more characters not only increases the workload of the dev by quite a lot, but also makes it hard to make the girls more unique. Let's be honest, the more characters are added, the harder it is to properly write, design and use them without feeling "equal" to another character in the cast.
So yeah, I think the situation sucks, but I feel the dev is doing the best he can in that situation. Maybe using "guest" characters as background in school or other classes would help to increase realism further? Or the plot changing to only experimenting with only 1-2 classes? I have no idea.
Anyway, I'm looking forward for the next update, and as I said, I already like the game the way it is. Was just giving my "2 cents".