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.
if the club members' final exam 
scores do not meet the average,
wird der Club wieder aufgelöst,
wenn die Testergebnisse der Mitglieder …
si las notas en los exámenes de los 
integrantes del club no alcanzan el promedio,
si las notas en los exámenes de los 
integrantes del club no alcanzan el promedio,
che se il punteggio complessivo dei membri negli 
esami di fine semestre non raggiunge la media,
que se a nota do exame final dos membros
 do clube não atingirem a média,