The second installment of the Sekai Series. The music room in the second semester at Kazusaen Middle School, where the clock tower is not repaired. The relationship between Byouinzaka Meiro and Kushinaka Choushi began there. The school's three eccentrics, Kushinaka Kogushi, Douno Kurori, and Gakemura Rouya, maintain a distorted balance. And then a murder occurs. The search for the culprit begins, with Meiro and Choushi playing detective, and the collapsed balance is further shattered... (Source: Kodansha, translated)