Hello I haven't beat the game yet but just wanted to say so far I'm really enjoying it. I'm on Day 11 of Kurato's route. It's not a perfect game, like Tigress said there are some issues with lack of world building or characters accepting some pretty odd things without question.
I feel that the history class with Mr. Blanchett would have been a good oppurtunity to have fixed some of these problems. Maybe you could have had some of the students asking him questions in class about this mysterious demon of the forest so that he could have given us some more background information. Also incorporating more of the village and folklore into the story would have really helped flesh things out. Like having the characters explore more of the village. There was one VN i played where the character read paragraphs from library books that talked about the myths and folklore of the world to try and solve the mystery of what was going on. Doing that really helped flesh out game and gave you more background info. It doesn't have to be a gigantic wall of text or anything like that but just enough where the world feels more real and the player understands whats happening.
Another thing that was a bit off was the lack of contractions. There was a lot of "it is" instead of just it's or "do not is not" instead of just don't or isn't. It made the main character feel a bit unnatural since most people don't really talk like that.
All in all though I'm still enjoying it. I definitely feel that you have a talent with this and that if you keep working towards improving your writing and storytelling that you could create something pretty amazing. I look forward to seeing whatever you have planned in the future :)