Invited to a wealthy client's mansion, time-traveling witch Yuko and her companions arrive to find a group of collectors assembled to participate in a mysterious auction. And the mystery only deepens when the collectors go missing one by one. As more guests disappear and strange occurrences abound, Yuko and her friends realize they must solve the mystery before they vanish as well.

It has been several years after the events of Shunmuki and Watanuki has become the new proprietor of Yūko's shop following her death. Domeki has taken a position at a university to study folklore and Kohane has become a student at the same university studying under Domeki. Due to Domeki's position, a series of events have occurred that requires Watanuki's services. The episode outlines the process by which Watanuki fulfills the request while presenting changes in many of the characters in the series. The ending theme is "Kaza Nagi" (風なぎ?) by Shikao Suga.