Konoha Inoue keeps his past as a bestselling teenage novelist hidden and lives as an ordinary high schooler, until literature club president Touko Amano, who literally eats the pages of books she loves and calls herself a "literary girl", recruits him to write stories for her to consume. What starts as simple assignments turns into real investigations, beginning with a request to help a classmate write love letters that spirals into something darker than either of them expected. Each novel in the series draws its mystery from the themes of a different classic work.