I like what you're doing.
The good:
* Unique art that's not AI, honestly this deserves more praise.
* Clearly a passionate first time developer.
* unique cast of characters with their own personalities/designs
The bad:
* Game seems a little over designed.
* Why do it in Unity when Renpy exists, unless what you're making needs game physics.
Then a bunch of minor things...
* Why does moving the mouse over the characters make them moan, it's distracting if not in a sex scene.
* Why is the phone UI used to show what's happening in the scene, should be a full image like the twister game. The phone should be for spying or viewing thoughts or something.
* The dialog jumps around a lot. It's hard to tell what's happening in a scene. Biggest example, Mika's beach... why does it just start with an unexplained sex scene? How did we get here?
I feel like you could turn this into a really cool game, just refine what you have a bit.