Seki-kun starts playing Go on his desk. Yokoi-san tries to ignore this since she doesn't know the rules, but this yet again turns into something rather unexpected.
Impossible... That can't be right.
Niemals... Das kann nicht sein.
Imposible... Eso no puede ser.
Non, les adultes ne joueraient pas 
comme ça avec un air si sérieux.
Non è possibile...
Não dá... Isso não está certo.