J realizes that a special gem, said to be cursed, dispppeared from the Sawaragi Art Gallery.
One day, a 21st classmate, Oriba, suddenly appears in Bashin and Meganeko's elementary school class. However, no one but Meganeko realizes it. Since then, one after another, weird phenomenons start to happen within the school.
One 196 page volume was released 7/15/2009