In a corner of the massive school city of Shiomi Academy lies the general library—commonly known as the "Great Library." The library club, which has a room in one corner of the library, spends its days busily working under the motto, "Let's make Shiomi Academy even more fun!" One day, the library club receives a request. It is to investigate Misono Chisato, a first-year music student known as the "Songstress"... A thrilling school pure love story unfolds, centered around the Songstress "Misono Chisato" and the girls who play together!