Mihiro finds a piece of paper in the student council room with some odd scribbles that might be handwriting. Kaoruko thinks it must be a riddle that Kouki devised for an upcoming story in his manga, and sets about trying to decipher it!
replaced that with ancient Japanese, 
and the resulting text is...
...ثمّ استبدلت ذلك باليابانية القديمة، والنصّ الناتج
dies durch uraltes Japanisch übersetzt,
und das Ergebnis ist …
sustitúyelo por la escritura Jindai
sustitúyelo por la escritura Jindai,
avant de traduire de nouveau 
vers l’ancien japonais.
e trasponendolo nella scrittura
giapponese antica, la frase che è apparsa...
substitui isso com japonês 
antigo, e o resultado final é...