A volume in Kawade Shobo Shinsha's Otona no Nurie Postcard Book series of adult coloring books, featuring Dayan the cat by Akiko Ikeda. It collects 16 illustrations of Dayan and friends, who live in Wachifield, a land where strange things happen.
The pictures include the Eiffel Tower, soup time, meeting Marcy and lamplight. The coloring pages are in postcard form, and the original color samples can also be cut out and used as postcards. The book is in a modified A4 format and has 40 pages.