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...
But as long as I'm in this 
showdown, I'll show no mercy!
،لكن ما دمت في هذه المواجهة
!فلن أظهر أيّ رحمة
Aber da das ein Wettkampf ist,
zeige ich keine Gnade!
¡Pero no mostraré piedad!
¡Pero no mostraré piedad!
Mais puisqu’on en est là, tant pis !
Ma, finché ci sono dentro, non avrò alcuna pietà!
Mas já que estou jogando,
 não terei misericórdia!
Раз я против тебя, пощады не жди!