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...
Since you couldn't use the pictures that 
Yuuki-san took, you retook them yourself.
Ya que no podías usar las 
fotos que Yuuki-san tomó
Ya que no podías usar las 
fotos que Yuuki-san tomó
Como você não conseguiu usar as
 fotos da Yuuki, você mesma as tirou.