Mia was such a dumbass that my canon is that her department deliberately sent her out to Spooky Island, hoping she'd get Sadako'd. Glad she's gone, hope she doesn't come back.
Haven't seen a single QTE so far that fits in a VN, and this one is no exception. They can be decent if used in an action game, since you're already used to twitch reflex inputs there. But when you're chilling with an interactive story like this and suddenly forced to go into ready mode, it's not a good player experience, and it's not good game design.
Renders are nice, UI is polished, plot setup feels interesting. Could've done without the typical (sorta but not really) incest characters, but I guess that's what the people want. Although they probably want real incest characters, so this middle of the road approach might not work for either crowd.
I think it's going to be tricky developing the game, considering a lot of effort seems to have been spent on the paranormal aspects of the story (which so far have been done well, imo - Mia's stupidity excluded). But making that work along with the more carnal aspects of an adult VN might be a juggling act. Anyway, interested to see how this goes, and good luck to the dev.