Of all the Hypno-themed VN games I've played (especially that come from Japan), this one probably most closely has what I'd consider "actual hypnosis"; with inductions and gradual entrancing of the various "heroines". I think the music/sound design works? The art is nice? The story is passable? And the hypnosis does actually progress beyond "take off your clothes" "okay, let's have sex now" like a lot of hypnosis stuff these days does - I think this game better nails the "psychological aspect" of hypnosis that's interesting (memory play, desire manipulation).
It doesn't really go far enough in some key ways (the relationships between the MC and the side characters are pretty shallow IMO); it's a little too much just a substitute for nonconsensual stuff for my liking. And most of the endings don't hit right for me at all. But it's still pretty fair.
The sequels to this game are a nose-dive. This is the best one.