Saying that this is hentai is like saying any movie with sex or boobs in it is porn. It astonishes me how prude people are in this day and age. This is why there needs to be more proper and realistic sexual education, and not only about the risks but mainly about how sex normally is conducted, men and women don't know anything about each others mind and body and when a man is expected to know exactly what to do he will take reference to the only sexual experience he has... porn. This is why the author (of the manga) created this series and this is why it is highly needed. Of course the manga can be arousing, and you shouldn't feel any shame for that. Because that is what happens when you develop on a sexual level. Sex is a very important part of life and there should be no shame for it, especially when you want to learn to understand and enjoy your own and your (future) partner sexuality.
I have read the manga with a female friend (we never had sex or were in any relationship other than very close friends before or after) when we were younger, we took notes and talked about it and learned a lot which I was grateful, because when I got in a relationship with my girlfriend, my gf and I were still virgins but we both actually enjoyed the first time we had sex and after several years our sex life and love for each other has only deepened and improved. I'm life long grateful to the manga and I have recommended to a lot of people I know.
