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...
The teachers here are lax about the 
rules, but I won't let this slide.
Los profesores de aquí son demasiado 
blandos con las reglas, pero no yo.
Los profesores de aquí son demasiado 
blandos con las reglas, pero yo no.
Os professores daqui são brandos quanto
 ao regulamento, mas eu não perdoo.