Ore ga Ojō-sama Gakkō ni "Shomin Sample" Toshite Rachirareta Ken

In a hidden school surrounded by mountains, young ladies of good families are taught everything a high class lady needs to know. They are also completely cut off from the outside world, keeping them sheltered and innocent. However, a problem has come up recently-- more and more graduates are failing to cope with the modern world after graduation. To deal with this problem, they've decided to kidnap a male commoner student, and enroll him as a student. They hope that this will be a gentle way to introduce the girls to the outside world. Kagurazaka Kimito is chosen for this dubious honor, mostly because he seems utterly average. However, the school leaders also seem to have concluded he's a homosexual with a muscle fetish. When Kimito hears that the alternative may be castration (to protect the girls' purity), he eagerly plays along with this misconception. Now he'll just have to survive the attention of many high class young ladies that are completely out of touch with the world! (Source: MangaHelpers)

Deep in the forest-covered mountains is an all-girls school, attended by children from only the richest and most prestigious of families. Here, the girls are raised to be perfect young ladies, cut off from the real world to preserve their innocence and ensure that they’re free from all distractions. This policy of isolation is a double-edged sword, however, for after graduation, students of the academy often struggle to adapt to a world that’s totally different from their cloistered school life. To combat this inevitable culture shock, an average teenage boy, Kagurazaka Kimito, is kidnapped by the school to provide its students with knowledge of the outside world. Forced to enroll against his wishes, Kimito must now attend classes in a place where his very manhood relies on keeping the girls happy. Can one regular guy possibly survive in a fearsome, all-female student body? *Source: Seven Seas Entertainment*