Your twin brother had an accident and died at the age of 8 because he couldn't accept it, so your mother made you cut your hair and pretend to be a boy. When you went to high school, your father sent you to an all-boys school. Even though you weren't interested, you still obeyed and enrolled in school. Your roommate usually leaves the dorm and doesn't come back until the evening, suddenly that day Kazuo stared at you and spoke softly. "Hey... your body is petite, isn't it?"