Itsuki finds out that in addition to Stardust Labyrinths where the "Impurity Lords" dwell, there is also the 13th labyrinth, as well as the existence of the 13th maiden. He sets out to find the maiden. However, there is the possibility that the 13th is a male. Although not quite convinced, he seeks all the male candidates he could think of...
I was just researching 
the ancient documents,
،كنتُ أبحث في الوثائق القديمة
Ich habe viele antike Texte erforscht
und bin zu der Erkenntnis gekommen,
Investigaba los documentos antiguos
Investigaba los documentos antiguos
En feuilletant d’anciens écrits,
Il fatto è che mentre
facevo delle ricerche sugli antichi testi,
Na verdade, estava
pesquisando documentos antigos
Дело в том, что я изучал 
древние рукописи