Nice, coherent art style throughout the entire VN!
I thought it was a little odd that if you visit the library twice in the school while searching it, you have the exact same conversation. Very deja vu.
The ending feels very abrupt and makes the story feel unfinished, since several loose ends are never tied up.
The music fits the atmosphere nicely and changes appropriately as needed.
Overall, a nice start to a creepy VN, just needs a little more attention to detail / fleshing out of the story. Nice work!