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 an Impurity who was left behind,
،كنتُ نجاسة متخلّى عنها
Ich war eine Befleckung,
die ganz auf sich gestellt war.
Era una impureza en el mundo exterior
y estaba sola.
Era una impureza en el mundo exterior
y estaba sola.
Je me suis soudainement
retrouvée abandonnée.
Ero un'Impurità abbandonata,
Eu era uma Impureza
deixada para trás,
Я была Нечистым, оставшимся