This is a great game. In fact, it's the first visual novel I've played that can actually be called a game. The creator has constructed the experience with such technical sophistication and attention to detail that it really stands out. I enjoy all the interesting and coherent menus. Choices make sense, they have real effects, and the story is cohesive almost no matter what you choose. The clear descriptions of choices' consequences in walkthrough mode are indispensable!
I'm extremely pleased with the central focus on a male protagonist dominating a set of girls that either are submissive or will be expected to submit to him. Starting to discover the submissive nature of Cassie and Akemi, especially, is a lot of fun. The dungeon is good, and the collars are a great idea. They remind me of a similar orgasm-inhibiting system from a great abandoned Literotica story, called the Complement...
The protagonist is pretty good so far, I can appreciate some of his motivations and I hope his story gets more interesting. I like the focus on a limited set of main girls. They are all good-looking and reasonably well-fleshed-out for this early stage. I always have a great time with hilarious male side characters in a story like this; Director Kellin is a perfect example. The helicopter thing caught me unaware both times and had me wheezing.
I am super excited to see this develop to the point where we can start to tell what's going on behind the scenes. I look forward to another ghost hunt. Most of all I'd like to find out how many happily collared girls I can rack up.