So the idee of the game(s) is perfect, but the models used could be better. While i guess using Artificial Accademy style illusion characters is easy, as making them is super easy and i believe there is a poser app with the games that use these models, the later illusion games can have a bigger variety in age looks. Right now everyone looks the same sort of young yet unidentifiable age (i would say between 16-22 or something), but the wife looks just as old as the students, wich makes it look odd if she is present in some scenes cause it just looks like a student is there in the scene.
Here are some examples of characters i made in Honey Select 2, which also has a poser app i believe. You can more easily make age differance stand out:
Reiko, my idee was end 30's beginning 40's, but i guess around 37 years old is what i was going for.
Next is Aya, she was made to be around mid 20's, so say 25 years old.
And last is Miyu, she would be the generic 18 year old student type.
No they aint perfect, but i tried playing with the ability to add wrinkles and laugh lines and such, to add age to the faces. Newer illusion games can be modded with more options for skin and cosmetic to even futher enhance that, so alot more options then AA2 type of models.
Now im saying this incase you may want to make a new game after this one, or a sequil, then using these models can boost your work atleast on a graphical point very much.
Good luck either way, and hope you game continues to get better once content is further added.