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...
Don't go using my voice to put in 
unneeded sound effects, Switch!
¡Switch, no uses mi voz para 
ponerle efectos innecesarios!
¡Switch, no uses mi voz para crear
 efectos de sonido innecesarios!
Não use minha voz para criar 
efeitos sonoros desnecessários, Switch!