Yuzuko and Momoko line up to get sweet potatoes from the school store. Momoko runs into Nagiko there, and through a serious of events, Momoko ends up believing she's being disrespectful to girls in the other grades. Meanwhile, the occult club tries to solve a riddle...
What?!
Was?!
¡¿Cómo?!
¡¿Cómo?!
Quoi ?
Eh?!
O quê?!