I love this game, I especially love the characters, and the story is really interesting, it is certainly one of my favorite koikatsu-based games. I'm still stuck at the Astrid choice though xD, it's been a couple weeks, still thinking about what to choose there, it's probably not as important as I'm making it to be, but I'm not someone who replays this kind of games, so...
I do agree the sex scenes are the weakest point of the game, they need to be longer, with some foreplay, more positions, and more passion. I do think they are improving, the last one I saw was much better than the first one, so kudos to the dev, keep at it.