A sheltered girl's first encounter with a commoner isn't romance, it's anthropology, and she's treating him like a field study gone hilariously wrong. The joke isn't that he's embarrassed; it's that they are, every single time their sheltered logic crashes into how the real world actually works. You're watching girls learn that "common sense" isn't an insult, one ridiculous misunderstanding at a time.

Kagurazaka Kimito, a thoroughly average high school boy, is kidnapped and enrolled at Seikain, an elite girls' academy hidden among the mountains. Its well-bred students are kept cut off from modern society, and too many graduates struggle once they leave. The school's answer is to bring in a regular boy as a "commoner sample" to ease the girls into the outside world. The catch? The school leadership believes Kimito is gay, with a particular taste for muscular men. When he tries to set the record straight, he learns that the alternative could mean castration, so he plays along. Now he's surrounded by sheltered, wealthy girls who have never met a male student, let alone a commoner, and who hold wildly odd ideas about how ordinary people live. With the blunt, naive Aika Tenkuubashi he starts the Commoner Club, which soon draws in shy genius Hakua Shiodome, sword-swinging Karen Jinryou and the polished Reiko Arisugawa. The result is a romantic ecchi comedy built on constant misunderstandings.