One day Tohko borrows a book from the library, but there are pages missing. There's no way the Book Girl, who loves books so much that she devours them, is going to stay silent about this! Caught up in Tohko's rampage, Konoha and Akutagawa are forced to perform a play for the school's culture fair. But Tohko and Konoha glimpse the darkness in his classmate's heart. A soul stands immobilized, bound by the mistakes of the past. Will the Book Girl be able to set it free?