The Caerula Adamas plot a way to destroy the mysterious Battle Lovers. They also want to destroy the Defense Club, so as to cut down on club expenses. Thus, they declare that if the club members' scores on their final exams do not meet the average, the club will be dissolved. The Defense Club reluctantly gets to studying. Meanwhile, the student council also tries to scout the financially savvy Naruko to be their treasurer. When Gero offers him a salary during negotiations, Naruko casually agrees to leave the Defense Club. Soon, a monster appears, and the four remaining Battle Lovers must struggle to defeat it themselves.
I hear that in math, he can tell the 
area of a shape just by looking at it.
Ich hab gehört, dass er in Mathe die Größe
einer Form weiß, wenn er sie ansieht.
Escuché que en Matemáticas, puede saber 
el área de un objeto solo con verlo.
Dicen que, en Matemáticas, sabe 
el área de un objeto con solo verlo.
En maths, par exemple,
A proposito di matematica, pare che indovini
 l'area di una figura semplicemente guardandola.
Eu fiquei sabendo que em matemática, 
ele pode dizer a área de uma forma só de olhar.