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...
Well, that means you have 
a rival, doesn't it?
حسنًا، يعني هذا أنّ لديك منافسًا، صحيح؟
Na, damit hast du wohl einen Rivalen, oder?
Bueno, tienes un rival, ¿no?
Bueno, ya tienes un rival, ¿no?
Ça veut dire qu’il te considère
comme son rival.
Beh, significa che hai un rivale, no?
Bem, quer dizer que 
você tem um rival, não é?
Понимаешь, это значит, 
что у тебя появился соперник!