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...
For you humans, the more 
open-minded, the better.
.بالنّسبة لكم أيّها البشر، كلّما تفتّح عقلكم كان أفضل
Menschen sollten lieber
etwas weltoffener sein.
Para los humanos,
entre más abiertos son, mejor.
Para los humanos,
cuanto más abiertos son, mejor.
Plus tu élargis tes horizons,
mieux c’est.
Per voi umani, più la vostra mente è aperta, meglio è.
Para vocês, humanos, quando mais
tiver a mente aberta, melhor!
Чем меньше у вас, людей, предрассудков, 
тем лучше.