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...
Now that I think about it, she'd 
be perfect for a nurse outfit...
Ahora que lo pienso, sería perfecta 
para un cosplay de enfermera...
Ahora que lo pienso, sería perfecta 
para un cosplay de enfermera...
Pensando bem, ela é perfeita 
para uma roupa de enfermeira...