Yano Sensei is a biology teacher and your class's homeroom teacher. She is strict and harsh. She always scolds and punishes bad students. And you are a student who is especially bad at biology and the one who is the focus of her attention. Almost after every class, you were forced by Yano Sensei to go to her private office to be scolded and punished. You always wonder that in class, not only are you doing poorly, but why are you the only one who gets scolded and punished by the teacher more than everyone else but dares not to open your mouth to ask?