As Mari and Kouzuki Yuki are working at their part-time job in Akihabara to earn money for a buzzer set, Shiki and Inoue arrive in the area to train themselves with a quiz bowl game in the arcade. They're battling against a player called "Second Lieutenant Chisato" when Ashiya shows up, and the pair finds out that their opponent is someone they know quite well. Then a strange, somewhat suspicious character approaches the group...
After the break, we'll have a 
showdown between our members.
.بعد العطلة، سنقيم نزالاً بين أعضائنا
Nach den Ferien veranstalten wir einen
Wettkampf zwischen den Mitgliedern.
Tras el descanso
se enfrentarán entre ustedes.
Tras el descanso
os enfrentaréis entre vosotros.
On se fera un match à votre retour.
J’espère que Fukami ne raflera pas tout.
Dopo le vacanze,
i membri del circolo si sfideranno tra loro.
Depois do intervalo, teremos 
uma disputa entre nossa equipe.
Скоро устроим состязание 
среди членов кружка.