Yuuki Reiko, member of the Occult Club, barges into the Sket-dan's room holding a picture of one of Kaimei Academy's seven mysteries, the "Ghost of the Incinerator". The Sket-dan are on the case (mainly Switch), trying to find out the truth behind the picture, and getting Shimada Takako from the Newspaper Club mixed up in it, too...
There is a column in the Academy Times 
which introduces them one at a time.
Hay una columna en el periódico escolar
Hay una columna en el periódico escolar
Tem uma coluna na Gazeta do Colégio
 que os apresenta um de cada vez.