Gen Kudou, a koto maker, believes that his delinquent grandson Chika would never grasp the depth of the traditional musical instrument. Seeking to atone for his naivety and comprehend the words of his late grandfather, Chika attempts to join the Tokise High School Koto Club. Although the club desperately needs members, the new president Takezou Kurata is reluctant to easily accept Chika's application because of his poor reputation. Nevertheless, after witnessing Chika's seriousness and enthusiasm, Takezou permits the troublemaker to join, alongside koto prodigy Satowa Houzuki and three of Chika's energetic friends. Kono Oto Tomare! follows this lively group of musicians as they aim to perform at the national competition.