Some thoughts:
slower corruption would be nice, if the girl is sleeping with people on day 1,then what is even the point of playing longer? A bit more control over what your actions are during sex scenes would be nice
a calendar: Knowing when events show up is great, not knowing just gets the player to skip through content without seeing anything new
a repeat of some events like the party on day 2-3 (?)
differing outfits
getting to watch the debutante BJ contest, pictures of people excited in the crowd are nice, pictures of the contestants on the stage would be better
couldnt get the halloween event to work
option to skip time/action points
a better time system than just 3 AP per day
maybe reluctance to drink so much that you start the game out being able to participate in all the really naughty events, option to join on subsequent semesters
a gate function: "Hey you are lvl 1, you've seen 7 out of 11 events on this lewd level, are you sure you wish to advance?", bonus points if it is immersive
the trait system you've mentioned
give us a button for: go home, shower, go to bed all in one when on 0 AP
more control over the selfies she takes, make the progression a bit more gradual
Locations:
Gym: more options on what to do, let her do cardio and stare at the people she finds attractive, maybe slip, fall, lose her pants to the treadmill
separate locker rooms, having to hide when having sex in them with option to be found/interrupted, no thrill if people are just going at it in public from day 1 onwards
a swimming pool, same thing for the lockers
maybe a "pet evening" or "elite evening" where the pool is reserved -> give option to peek
hot spring: same as swimming pool, but naked by design
massage parlour
more fleshed out pet play mechanic
fighting other schools in sporting events and such
let MC be a cheerleader, "cheer up" the players, like in "Course of Temptation"
maybe have sport teams with a rivalry do increasingly stupid bets with one another culminating in getting to be with the other teams cheerleaders (get an event for both sides, Dom event with opponents cheerleaders, sub event when your team has lost for instance)
meeting people, getting to know them, building relationships. So far people comment on your pictures, you'll get to know like 3 of them. Give us a "contacts" option in the phone where we can learn about those people, maybe get more info as time passes and you actually talk/interact with them
bugs:
waitress events spit out errors all the time
gym lets you train forever, triggers sex scenes
scrolling back at the end of some events makes the game unresponsive
really neat idea, I think this really, really needs to be a slow burn. Why would people come back if she fucks after like 5 minutes of gameplay?
Good luck with the game
also casting my vote for some Futa content
