"To bring the class together, to make the school festival a success..."Hibiki Natsume, a new teacher, falls into the body of a male student. The class is unmotivated before the school festival. Natsume-sensei is seduced by a male student using the school festival as an excuse. Natsume, who wants to bring the class together at the school festival, tells himself that it can't be helped, and gradually falls into pleasure in front of the increasing number of students' dicks.