This is the first supplement for Yuuyake Koyake, and introduces new types of characters, the mononoke. Where the henge covered in the basic rules are animals with something magical about them, mononoke are creatures of pure magic. The five new character types introduced here are michinoke (road monsters), oni (ogres), kappas, ghosts, and visitors. The book also features some introductory stories and two scenarios.
The English translation contains two additional scenarios and is listed under Twilight Tales.