I think the plot is a really cool idea, but imo the writing is just not there.
The characters tend to feel fairly bland, while even somewhat nonsensical in the case of Hana, and progression of the story hinges heavily on similar nonsensical writing, and the protagonist being.....rather dumb, I feel.
The first instance is really early on imo, with the principal canceling his health insurance, and then trying to threaten him to keep quiet since higher ups wouldn't believe him over her. This.....doesn't make any sense? It isn't a he-said she-said circumstance of being his word against her's, there was already a tangible consequence to her doing that, with evidence.
Similarly, later on when the principal confronts you about being seen with Hana, the conversation again feels nonsensical in order to get to the end the plot demands. Why would the principal wait to confront us, when in every previous case she acted immediately? Why would she refuse to verify anything with Hana? Why didn't the protagonist say a single thing to explain a circumstance that is extremely easy to defend?
It's a shame, since the idea behind the game seems interesting, but the writing feels like it's bumbling along with little regard for the involved characters...