So guy went to a former girls-only high school. No, you didn't go there for the harem. You chose that school because it is the closest one to your house. You'd think this will quickly become a harem story, but the main character himself can't get over how all the girls are just casually tossing tampons to each other in the class, simply because they are so used to it (being on a girls-only school in the past years) and are not shy about it in any way.
Now the characters may be rather stereotypical, but they are very well executed! You have the rich, perverted airhead bimbo, a perverted miss-perfect highschool student, a tsundere, a spoiled drunk teacher. All the signs of a harem right? But it still doesn't become one! These personalities have a nice mix to them, which keeps the characters fresh and different, from what you are used to in your typical shonen anime.
