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...
and I found out that 
Granvania has a labyrinth
ووجدتُ أنّ غرانفانيا تحتوي على متاهة
dass neben den zwölf Dungeons
der Sternzeichen in Granvania
y descubrí que Granvania
tiene otro laberinto
y descubrí que Granvania
tiene otro laberinto
ho scoperto che a Granvania dovrebbe esistere
un altro Labirinto oltre a quelli delle 12 Costellazioni.
e descobri que Granvania
tem um outro labirinto
и обнаружил, что у лабиринта в Гранвании