Who says that you can't learn anything from manga.
先生で○○しちゃいけません Or Learn Sex Education With Me by Musha Shabu Puberty is a very complicated period of time for everyone. The changes that happens to the body can be scary and that's why is important to be well informed. Doesn't matter if your problem is big or small, Yui sensei, the new school nurse and Health teacher, is always available. If you have worries about your body or doubts about sex, her vast knowledge will help you grow healthy and happy. Don't think that this is a hentai, it's a pretty serious approach to sexual themes. Obviously, due to the topics it touches there will be heated up scenes, but nothing outrageous. A good read with a very nice art.