So, 20 minutes in, and the writing is a glaring hole for me. For the game to work, you have to just accept that a prestigious all-girls high school with shady connections to the government randomly opened its doors for one male student is participating in a highly unethical experiment to combat the growth of...(adjusts glasses) body shaming. This high school, instead of a college course that actually dabbles in the science behind sexuality, is taking their students out of their classes to go to a nudist beach, rather than host the experiment in the school...
And then there is the dialogue, which feels amateurish at best and feels like it was written by AI. The main character (supposedly some nerd at his old school, but has a well-built body and stylish cut) is just another generic ass dude. Some of the scripts feels mad childish and out-of-place.
EDIT: And it's a ripoff of the Shiwasu no Okina Nudist Beach doujin. Not a great start.