That's weird because this is all about fancy stuff compared to most rpgms. Bigger map, bunch of variables, collectibles, progression systems. Style over substance.
I can see why some people would like it because of all that. Just not for me.
Well the game is quite straight forward from a certain point of view. You want NTR? Just start the routes and stalk the girl. You don't want ntr? Don't start the routes and collect points. The scenes also have a clear progression.
If the game was fancy, then doing the activites that give you points, would open up the NTR routes and you would have to decide, how much time do you want to dedicate to keeping the girl safe or get the good end. For example the little hearts in the menu would be more important if you could get them back by spending time with her (It's only a progression bar).
The game itself isn't that deep as far as gameplay goes. It has some interesting features but doesn't do much with it. For example the phone is just a mechanic that teases the player. If you could use it to guess where the girl is and stop the scenes from happening then it would be more.
Is there any sex scene with MC ? got happy end but it just end... no sexy time.
I think even the developer stated that, there is no scenes with the protag because that isn't the main theme. He is working on a sort of After Story for this but that will also concentrate on the bad ends.