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...
I only believe in reality which 
is backed up by hard data!
¡Yo sólo creo en los hechos 
y en la realidad empírica!
¡Yo sólo creo en los hechos 
y en la realidad empírica!
Eu só acredito na realidade
 embasada em dados sólidos!