[Machine Translation] The Akiba Library, located in a field of Japanese red grasses, has a librarian who is a great detective. An unopened letter box left by a great-grandmother, a cat from a book cafe that has disappeared, a secret of an old family that was discovered while preparing to open the library.... The library gently guides users with such mysteries to the solution by gently offering them classics and masterpieces that everyone knows, as well as books that are known only to those in the know. The theme of the six stories is "Where have you been? Six mysteries based on the theme of "Where have you been? A little extra edition of a warm library mystery.