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...
"Come to this place after 
school tomorrow, alone."
"Ven sola a este sitio 
después de la escuela."
"Ven sola a este sitio 
después de clase mañana."
"Venha a este lugar depois 
da aula amanhã, sozinha".