Macaroni spinach (volume 1-9)

The main character, Okita, is a freshman who entered a high school in Tokyo, "Pepper Gakuen". On the day of the entrance ceremony, she witnessed a duo -like duo of the school in the schoolyard. When the ceremony was over and I entered the classroom, somehow the duo was in the classroom. In fact, the two were the ultimate falling of the school, and there were no strangers in the school as a student, and Niyo Kinto and the knee.