"Rin" stands in the school at a certain school in Tokyo. She is a serious teacher. It was such "Rin", but it was troubled by the practice of the bad student of the class which the assistant teacher assumed. The student "Suzuki" and "Kameda" intensely smoke in the school and crush the cleaners. Even if 'Rin' was careful, 'Rin' was in trouble. One day, we suddenly called from "Suzuki" and believed in the words "we want to hear the story..." and we went to the designated place to hear their talk...