I thought the same thing, that hypnotist guy is really creepy.
he probably has some sort of thing for her or the main guy.... well I read a completed one very similar to this a while ago and it turned out she came back asking for more and he told her the truth that the pills were really nothing and that she was doing it all on her own. Cant remember if it is this manga or another. But if it is, it is completed on another site. or at least further along than here.
I'm pretty sure its just in her head. The pills don't do anything. its just when you believe something it can be true. I've seen other stories do the same concept.
is he testing those drugs on her???
spooky....