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...
Pick whichever one you're best at.
.اختارا أيّ لعبة تجيدانها
Sucht euch eins aus, in dem ihr gut seid.
Elijan el que quieran.
Elegid el que queráis.
Au jeu que vous voulez,
choisissez.
Scegliete pure quello in cui siete più bravi.
Escolha o seu melhor.
Выбирайте, во что вы лучше 
умеете играть.