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...
Personally, I'm quite convinced 
she's one of those archetypes
En lo personal, estoy convencido de 
que ella es uno de esos arquetipos
En lo personal, estoy convencido de 
que ella tiene uno de esos arquetipos
Pessoalmente, estou certo de 
que ela é um daqueles estereótipos