In order to defeat Impurities that turned out to be far stronger than expected, Itsuki is pressured to perform a "Double Love Ritual" with two maidens at the same time. It is said to produce powerful Star Children, but it has never been performed before. Itsuki steps into uncharted territory, following the lead of onee-san maidens Reone and Falun.
In layman's terms, the pervert 
Visitor who has the ability
وبالشّروط العاميّة، الضيف المنحرف الذي يملك القدرة
Du wirst in die Annalen eingehen
als der Stelzbock-Seelenwanderer,
En términos generales,
el pervertido Visitante
Así resumiendo,
el único Visitante promiscuo
Autrement dit, ça veut dire
que parmi les Visiteurs,
In parole povere,
Ou melhor, pelo que diz o
Narcis, o Ser Safado capaz
Проще говоря, развратный Посетитель, 
способный