High school student Yuge Itsuki was sent off to a strange parallel world with his childhood friend Konatsuki Mahiru. It was the magical world of "Granvania", which was facing a crisis from the threats of "Impurities." Itsuki was summoned to this world as a "Visitor" to save this world, but to accomplish this mission, he had to perform a ritual known as the "Love Rituals..."
The Love Ritual isn't the same 
thing as procreating, you see.
.طقوس الحبّ لا تشبه الإنجاب في الواقع
Das Liebesritual unterscheidet sich
vom ganz normalen Schöpfungsritus.
El Ritual de Amor
no es lo mismo que procrear.
El Ritual de Amor
no es lo mismo que procrear.
Le rituel de l’amour n’est pas
une conception ordinaire,
Il Rito d'Amore
non funziona come la procreazione.
O Ritual dos Amantes é diferente
das atividades de reprodução.
Любовный ритуал отличается 
от обычного размножения.