It's the same old club room, but the vibe between Io and Ryuu has changed. Have they had a fight? But then again, the others reason, they didn't get along very well back when they first joined the club... Then, when a fight breaks out, the cold war between the two second-years ends up getting the Battle Lovers in big trouble!
Like "Doubling up must improve 
their cost performance!"
Wenn man beides hat, müsste doch
die Kosten-Leistungs-Analyse gut sein!
Tener dos sexos mejora la eficiencia.
Tener dos sexos mejora la eficiencia.
Deux en un, ça réduit les coûts ?
Tipo "Sdoppiarsi migliora
il loro rapporto costi-benefici"!
Tipo "O dobro deve 
 melhorar o custo deles!"