I played the game on DLsite, quick summary, the game is a long grind with night to day time limit.
The more you touch her the more points you buy so the more level ups you can purchase.
before you even fuck here be prepared for at least 1h grind. You cant cheat with cheat engine, I tried everything.
The level ups consists of how longer it is for her to wake up, how long the night limit is, exp multiplier,
You have to purchase to see her naughty meter. At some point you will be able to purchase "control all" which lets you
basically have unlimited night and change her clothes and naughty meter.
Ahegao part if you interested in that its just her eyes rolling over, no sweat and hardly any reaction.
It is a good mid game to have some fun if you don't have better ones.