The protagonist of the hentai Sayako is a special agent of a secret military organization. She is assigned with a new task - to find the sources of drugs in the country. She is transferred to the Mikami Institute, where she works as a teacher. Soon she becomes an object of desire of one of the students - Yunichi Yano because of her resemblance to his late mother. He likes to film everything and Sayako won't just investigate while he's constantly dragging after her...