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...
There have been witnesses claiming they've 
seen a ghost hovering over the flower beds.
Hay testigos que han visto al fantasma
Hay testigos que dicen haber visto al fantasma
Testemunhas dizem terem visto um 
fantasma flutuando perto do canteiro.