I enjoy this game for the same reason.I personally like it because of the abundance of consensual, soft-core nudity. Dr. Vibes is exemplary in a specific fetish that other games have trouble hitting.
Also, F95zone really likes VNs.
That said I would call it a VN, but with repeatable scenes, which seems to apply to a lot of games on f95 with the sandbox tag. In the end there are no real choices that affect the story (at least as far as I'm aware).
In terms of constructive criticism I think the repeatable scenes could have an element of randomness so they don't repeat exactly, and take into account the story progress. For example once a character becomes comfortable with nudity the hesitance should be removed from earlier game repeating scenes.