I'm going to be very honest here. This wasn't my cup of tea. It was all right for a visual novel but there was very little to make it stand out. I wouldn't call this horror by any stretch; I felt more like it was a heavy-handed romance with horror thrown in as an afterthought. The UI reminded me a little bit of old Sierra mystery games, but it tended to just obscure the text more than anything, and I found myself having to rewind text because I'd miss it trying to sort through the inventory. I felt like the main character's focus on Damian bordered on obsessive, and certainly not in an endearing or healthy way. I also felt like the time-traveling portion could have been expanded on a bit, because that was probably the most interesting concept in the game.
Overall, the game needs work. It has the potential to be an amusing and interesting story, but there are a lot of tweaks that need to happen before it gets there. I would say the side characters had more of an impact on me than either the main character or Damian did.