First off lets start with: What a Great Idea it seemed. The idea was nice, but I believe it was executed poorly. Obviously the focus is on Sylvie (excuse me if I misspell the name) and how in a very dull plot on how a guy, "Teppei" (look alike and a douche) can make her fall for him. The story does not seem to be well put together and it doesn't lead to anything major. If this were a love story, then it lacks a lot of affection and character development. Since this is a hentai of a sort, then I guess the plot is good. So, in a nutshell: Sylvie learns about sex, "obviously her first time", she is conflicted on her feelings for the douche bag, and sure enough more no means yes sex follows and some slight demeaning sexual things to make her feel more feminine, and what do you know she falls in love with the douche.
Copulating scenes are interesting because they tried to get creative with it, and it would be something that you have to see.
Over all it could have been better, it was a nice idea, but it seems they might have dropped the ball.