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...
Student Council Treasurer, 
second-year, Unyuu Mimori.
Tesorera del consejo estudiantil, 
del segundo año Unyuu Mimori.
Tesorera del consejo estudiantil, 
Mimori Unyuu, de segundo curso.
Tesoureira do Conselho,
 segundo ano, Mimori Unyuu.