It has been a long time since a vn has taken me completely by surprise with its quality and premise. This also has the distinction of taking me completely out of my comfort zone without driving me away. I am freshly new to the whole "mind-control" sub-genre, so that's probably why I feel this way, but I find the idea behind the player character's objectives so patently unethical that it almost affected my stomach. Despite this, the dialogue and narrative are so clear-cut and faithful to the environment that this can be looked past into a very interesting view of the story that kept me playing all the way to the morally ambiguous conclusion... It's kept me thinking about it days after finishing your demo (and signing up to the Patreon), so kudos.
I also noticed so much attention to detail in that the choices you make affect later fixed dialogue and visuals. (Cerise reacts so much to everything you do!) It really impressed me.
Since character backstory appears to be a thing in this, I wonder: is there also character growth planned? I guess part of me just wants to know if Keller will question what he's doing down the road. :P