Nanako Hanada works as a manager of a bookstore, which doesn't have many customers, due to the rise of digital formats. Nanako and her husband Ken are also on the verge of divorcing. Her work life and personal life are equally in rough shape. One day, Nanako signs up for online dating site AU×AU and leaves one sentence in her profile, which is "I will recommend a book that suits you right now." Whenever she meets someone in person from the dating site AU×AU, she recommends a book to them.
