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...
You should know this one, right?
يجدر بك أن تعرف الإجابة، صحيح؟
Das dürftest du ja wissen, oder?
Deberías saberlo, ¿no?
Deberías saberlo, ¿no?
C’est ton truc ça, non ?
Dovresti saperla, giusto?
Essa você deve saber, né?
Ты наверняка это знаешь.