To most, Asahigaoka appears to be typical, dull farmland; nonetheless, no day in this hamlet can ever be termed colorless, owing to five pupils of varied ages occupying the lone class at the town's only school. Renge Miyauchi, the youngest pupil, offers undiluted wit, curiosity, and her trademark catchphrase, "Nyanpasu!" The Koshigaya siblings include the calm ninth grader and elder brother Suguru, the small eighth grader Komari, and the mischievous seventh grader Natsumi. The recent arrival of Tokyo-raised fifth grader Hotaru Ichijou, who appears overdeveloped for her age and thus naturally holds an air of maturity, rounds out this lively and vibrant group of five classmates. Non is based on the manga written and drawn by Atto.