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...
Kaimei Academy second-year, class D...
Del segundo año de la 
academia Kaimei, clase D...
Del segundo año de la 
academia Kaimei, clase D...
Segundo ano do 
Colégio Kaimei, turma D...