This is a good game, with a pretty interesting story, but the quality and placement of the porn and actual gameplay elements seem to take away from it rather than add. I mean, even if porn isn't the focus, just having a whole bunch of gameplay with very few sex scenes only works if those few sex scenes are important to the plot, or visually memorable, or otherwise worth having. Which the ones here are not.
I'd recommend either redoing this as a non-adult VN, or commissioning an artist to get the visuals to hopefully match the writing properly, or maybe even rebooting it with the upcoming Koikatsu Sunshine, whenever that gets a TN. I like oldschool Koikatsu, but this game in particular is being held back by it.