Mihuyu is a high school student living in the town of Yomunaga, known as the 'Town of Books.' With a renowned book collector as her grandfather and her father as the caretaker of the massive library 'Mikura-kan,' Mihuyu ironically does not like books at all. One day, while visiting Mikura-kan in place of her father, she discovers a message left by a book thief. The moment she reads the message, a curse is activated, transforming the town into a world from a story...?!