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.
Well, figuring in the rate of 
fluctuation made it difficult...
Na ja, der Wechselkurs war anders als sonst …
Bueno, el índice de fluctuación 
estaba algo desbalanceado...
Bueno, el índice de fluctuación 
estaba algo desbalanceado...
Beh, il tasso di cambio 
era un po' diverso dal solito...
Bom, a taxa de variação era
 um pouco fora do normal...