This was a lovely short read! I enjoy a lot what you did with the utilization of type font throughout in order to express things about the systems/happenings. There's a lot of little things you do with sound and flat colors in order to save your resources for other things - focus on words or the expressions that Kaoru makes once she appears. The very dead-eyed expression she makes at the end is particularly my favorite, but perhaps that's an easy pick considering.
I also like what you did with the illusion of choice here. I read through it a couple of times and just thought about it. I like the implication around what Enna is versus how Kaoru may exist as a handler. It feels like there's more to Enna that she doesn't know about herself - something that Kaoru knows but is refusing to tell her. The constant repetition of her asking Enna to be a 'good girl'. There's a lot of light details around events that make me ask questions and that's always a good thing in a short VN of this style. I'll be keeping an eye on your future projects!