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...
It is one of the seven 
mysteries of this academy.
Es uno de los siete misterios de la academia.
Es uno de los siete misterios de la academia.
É um dos sete 
mistérios deste colégio.