I know, I need to try to find "legitimate" reasons to bump those prices. Like outer is expensive bc isolation...
What would be your explanation / prices ?
I don't know how you plan to structure this part in the end, but I'll just give my own "version".
Rules should not be enforced for the girls, but rather "punished" for breaking. The punishment could be a stat penalty or a free "action" from the player. In the future, certain "bad girls" could break them on purpose (so they get punished).
Tier 0 rules could be really generic stuff, that could be passed during the first/second week, both as reputation and as money cost; for example, wear the school uniform, don't be late, don't speak during exam, etc. It depends on how much do you want to explore this angle and what features will be added in the future.
Tier 1 rules should be stuff that require a bit of convincing and a small amount of grind (2-3 weeks max). This can include wear a slutty uniform, don't wear outerwear, maybe even do small gestures at the beginning (warm hello to the player, present underwear for checking, etc). Tier 1 rules can have multiple layers that require the player to unlock the previous one (like a skill tree).
Tier 2-3-4 rules should include the stuff that are outside the boundaries of a normal school. Unlocking them should require advanced conditions, high reputation, a lot of money, maybe even some events (since you plan to add something like that). They can be considered as "ultimate" perks, unlocking them should be a big deal and probably trivialize the game by this point. This can include take the test naked, present "assets" before the exam, masturbate/bj/hj/toys/etc before exam, etc.
Sorry for the wall of text, I'm a game dev myself so I always have plenty of ideas. Feel free to take from it what you want
Btw,
HelotGames , this is not limited to the mod, I would love to see some of this in the main game as well. The more kinky stuff to play, the better