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...
could it be anything other 
than a Boys' Love Ritual?
أيمكن أن يكون له معنى آخر عدا طقوس حبّ الفتيان؟
¿Qué más puede ser
que un Ritual de Amor de Chicos?
¿Qué más puede ser
que un Ritual de Amor de Chicos?
ça ne peut vouloir dire
que « rituel des garçons » !
se non un Rito d'Amore tra maschi?!
o que pode ser além do Ritual
dos Amantes entre garotos?
что же это, если 
не Мужской Любовный ритуал?